Lubrication Guide · All 9YF Models · Grease Fittings, Chain Oil and Gearbox
स्क्वायर बेलर लुब्रिकेशन गाइड और ग्रीस पॉइंट्स
Correct lubrication is the single largest determinant of baler component lifespan. A pickup hub bearing greased every session lasts 25,000–35,000 bales; the same bearing greased once at the start of the season fails at 8,000–12,000 bales. This guide covers every lubrication point on the 9YF series — the correct grease type for each, the interval, what happens when it is missed, and the common mistakes that shorten machine life despite the operator believing the machine is correctly lubricated.
Covers: grease type selection · fitting locations by zone · daily vs weekly vs annual intervals · chain oiling · gearbox oil · lubrication mistakes
Grease Type Selection: Why the Wrong Grease Is Almost as Bad as No Grease
Not all grease is interchangeable. Using the wrong grease type in a fitting can cause grease degradation, seal damage, or inadequate film strength under load — producing faster wear than the specified grease would allow. The 9YF series uses two main lubrication categories:
EP Lithium Complex Grease — NLGI Grade 2
For all bearing and pivot fittings on the baler
EP = Extreme Pressure additive. This is not optional — the pickup hub bearings and plunger guide rails experience significant shock loading during normal operation. Without the EP additive, the grease film breaks under peak load and the surfaces contact metal-to-metal. Standard automotive lithium grease does NOT contain EP additives and will not provide adequate film strength at these load points.
ग्रेड 2 = medium consistency. Thin enough to flow through grease nipples at workshop temperature; thick enough to stay in place in bearings and not leak out during operation. Grades 1 or 3 are occasionally specified for specific points — follow the operator manual exactly if a different grade is called for.
Light Machine Oil or Chain Oil
For open chains only — not for bearing fittings
Open drive chains require oil lubrication, not grease. Grease applied to an open chain attracts crop chaff and soil particles — these particles become embedded in the grease and form an abrasive paste that wears chain rollers and sprocket teeth faster than no lubrication at all. Light machine oil, used motor oil or dedicated chain oil penetrates the chain roller-pin interface and lubricates from within. Apply to the roller face, not the outer plates.
For enclosed oil-bath chain cases: check the oil level at each pre-season service and top up with the specified oil type. The oil-bath system does not require daily attention but the level must be confirmed annually.
Grease Compatibility Warning
Different grease types are often incompatible — mixing them can cause the grease blend to soften and lose its load-carrying ability. Never pump a different grease type into a fitting without first purging the old grease. To purge: pump the new grease until old grease is visible exiting around the fitting or from the seal. Incompatible combinations include: lithium vs calcium soap greases, and standard lithium vs lithium complex. When in doubt, stick to the same brand and type of EP lithium complex Grade 2 throughout the machine life.
Lubrication Fitting Locations by Zone
The total number of grease fittings on a 9YF series baler ranges from 22 to 36 depending on model. Consult your operator manual for the exact count and location diagram for your specific model. The zones below cover all standard fitting locations:
Zone 1 — Knotter Mechanism4–6 fittings · Every session
Cam follower arm pivot (×2): one per knotter side, typically on the outside of the guard.Every session
Bill hook shaft end bearing (×2): one per side, recessed in the knotter frame.Every session
Needle arm pivot (×2): at the base of the needle arm where it connects to the drive linkage.Every 8 hours
Zone 2 — Pickup Reel4–6 fittings · Every session for hubs
Pickup hub bearings (×2): one at each end of the pickup reel tube. Highest-priority fitting on the entire machine — never skip these.Every session
Cam follower pivot (pickup cam, ×1–2): controls tine retraction timing. Usually on the inside of the right-hand pickup side plate.Every 8 hours
Gauge wheel axle pivot (×2): on the pickup height adjustment gauge wheel axle brackets.Weekly
Zone 3 — Fork Feeder and Packer4–8 fittings · Every 8 hours
Fork feeder main pivot (×1–2): the primary bearing point of the fork arm that pushes crop from the pickup into the chamber inlet.Every 8 hours
Packer arm pivots (×2–4): on models with a separate packer mechanism, typically 2 arm pivots per side.Every 8 hours
Fork feeder drive eccentric bearing (×1): where the drive linkage connects to the fork arm.Every 8 hours
Zone 4 — Plunger and Main Drive4–8 fittings · Weekly to 8-hour
Connecting rod bearings (×2 per rod, ×2 rods on some models): at the crankshaft end and plunger end of the connecting rod. High-load fittings.Every 8 hours
Plunger guide rails: apply grease to the rail surfaces rather than through nipples on most models — use a brush or rag to apply grease to the top and bottom faces.Weekly
Main drive shaft bearing (×2): where the main drive shaft passes through the frame side plates. Critical load-bearing point.Every 8 hours
Zone 5 — Frame Pivots and Star Wheel4–6 fittings · Weekly
Star wheel bearing (×1): the pivot bearing of the bale-length metering wheel. A stiff star wheel causes slipping and inconsistent bale length.Weekly
Chain tensioner pivot (×1): allows the spring-loaded tensioner to move as chain deflection changes during operation.Weekly
Tongue hitch pivot (×1): the horizontal pivot that allows the baler to follow field undulations relative to the tractor.Weekly
Bale chute pivot (×2): where the bale exit chute connects to the main frame and where the chute arm pivots under bale ejection load.Weekly
Master Lubrication Schedule — Quick Reference
| अंतराल |
Fittings |
Lubricant |
What Failure Looks Like |
| Every session |
Pickup hub bearings (×2), knotter cam follower pivots (×2), bill hook shaft bearings (×2), open drive chain |
EP Lithium #2 + chain oil |
Bearing failure within 1–2 seasons; miss-ties from dry cam followers |
| Every 8 operating hours |
Needle arm pivots, fork feeder pivots, packer arm pivots, connecting rod bearings, main drive shaft bearings |
EP Lithium #2 |
Stiff needle arm causing timing shift; feeder mechanism wear; connecting rod knock |
| Weekly or every 5 sessions |
Star wheel bearing, chain tensioner pivot, gauge wheel pivots, tongue hitch pivot, bale chute pivots, plunger guide rails |
EP Lithium #2 |
Inconsistent bale length from stiff star wheel; increased wear from un-lubricated frame pivots |
| Annual (pre-season service) |
All fittings — full complete round plus gearbox oil level check and change if at interval |
EP Lithium #2 + gear oil |
Cumulative wear from fittings that were missed during the season |
Chain Lubrication: The Correct Method
Open chains must be oiled, not greased. This point is frequently misunderstood — operators who carry a grease gun to the field sometimes apply grease to the chain when it looks dry, not realising that greasing a chain is counterproductive in a dusty agricultural environment.
Wrong: Grease on Open Chain
Grease is too thick to penetrate the chain roller-pin interface. It accumulates on the outer surfaces and immediately attracts chaff. The resulting abrasive paste wears rollers and sprockets. Also makes chain inspection for wear elongation impossible.
Correct: Light Oil on Open Chain
Apply light oil to the roller face of each link. The oil penetrates the roller-pin interface and reduces wear at the point where wear actually occurs. Excess oil drips off cleanly. Any chaff attracted to the oil does not embed in a thick grease carrier.
Application method: with the PTO disengaged and mechanism stationary, apply oil to the chain using an oil can or brush as the chain is slowly rotated by hand. Alternatively, chain lube sprays in aerosol form penetrate the link interfaces effectively and are practical for field application. Apply at each session start before engagement.
Gearbox Oil: Specification, Level and Change Interval
Correct Oil Specification
The gearbox oil specification is given in the operator manual for each 9YF model — typically an SAE 90 GL-4 or GL-5 gear oil, or a specific industrial gear lubricant. Do not substitute engine oil for gear oil. Engine oils lack the high-pressure additives required for gear tooth protection under the load peaks of the baler mechanism. Do not use automatic transmission fluid unless specifically permitted by the manual.
Level Check
The gearbox has a level check plug (typically on the side of the casing at the correct fill level) or a dipstick depending on the model. Check the level at the annual pre-season service with the machine on level ground. Oil below the level mark means the gearbox is running under-filled — add the correct oil type through the fill plug until oil runs from the level plug. Overfilling causes the gearbox to foam and loses the lubrication quality of the oil.
Change Interval and Condition Check
Change interval per the operator manual — typically every 100–200 operating hours or every 3–5 seasons, whichever is first. At the pre-season level check, drain a small sample of oil onto a white cloth. Golden to dark amber colour with no particles: acceptable. Milky or watery appearance: water contamination from a failed seal — change immediately and investigate the source. Metal particles visible on the cloth: internal wear — inspect the gearbox before the season. Dark black oil with a sharp smell: oxidised from overheating — change and investigate why the gearbox ran hot.
Common Lubrication Mistakes That Shorten Baler Life
MISTAKE1
Using automotive wheel bearing grease instead of EP lithium complex. Standard wheel bearing grease is NLGI Grade 2 lithium soap but lacks the extreme pressure additive. It looks and feels identical to EP grease. The difference only appears under load — the film breaks on high-load fittings and metal-to-metal contact occurs. Always check the label for “EP” before using any grease on high-load baler fittings.
MISTAKE2
Greasing the chain instead of oiling it. Described in detail above — grease on open chains creates abrasive paste from crop debris. If you have previously greased an open chain, clean it with solvent before switching to oil application to avoid the grease-plus-chaff abrasive mixture forming on a freshly oiled surface.
MISTAKE3
Over-greasing bearings. Pumping too much grease into a bearing cavity until the seal begins to weep grease is not “more lubricated” — it is seal damage. Excess grease pressure deforms the lip seal, allowing grease to escape and water and debris to enter. One to two strokes of the grease gun is correct for a fitting that was greased within the last session; three to four strokes for a fitting that missed several sessions.
MISTAKE4
Skipping the “minor” fittings not on the daily list. Fork feeder pivots and frame pivots are on the weekly interval for a reason — they need lubrication, just less frequently. Operations that only ever grease the daily fittings find these components wearing prematurely because the weekly fittings are consistently missed. Set a calendar reminder for weekly greasing at the midpoint of the operating season if the weekly schedule is easy to forget.
MISTAKE5
Mixing different grease types. Adding a different brand or type of grease to a fitting without purging the old grease can create an incompatible blend. This is particularly problematic when a machine is purchased used and the lubrication history is unknown — if you cannot confirm the grease type used previously, purge all accessible fittings with the new grease before establishing the correct lubrication programme.
MISTAKE6
Storing the grease gun at the workshop instead of on the machine. If the grease gun is at the workshop and the baler is in the field, the daily greasing step is skipped. Keep the grease gun on the machine — either in a tool box on the drawbar or in a dedicated holder attached to the machine frame. This single logistical change removes the barrier that causes most daily greasing omissions in practice.
PTO Driveshaft Lubrication
The PTO driveshaft has dedicated grease nipples on the CV joint yokes — typically 2–4 nipples depending on the shaft configuration. These require annual greasing at the pre-season service. They are separate from both the tractor PTO lubrication and the baler mechanism lubrication. Full specifications: पीटीओ ड्राइवशाफ्ट और सीवी जॉइंट साइजिंग गाइड.
Frequently Asked Questions — Square Baler Lubrication
How do I know if a grease fitting is accepting grease or is blocked?+
A fitting that accepts grease correctly shows grease beginning to appear around the component seal or at the join between moving surfaces after a reasonable number of pump strokes. A fitting that does not accept grease — the grease gun plunger is immovable or the lever requires extreme force — is either blocked by old compacted grease in the port, or the nipple ball check is corroded open so grease goes nowhere. For blocked fittings: try pressing the gun head firmly onto the nipple before applying pressure — sometimes partial sealing is the issue. If still blocked, remove the nipple with the appropriate spanner, clean the port with a probe or compressed air, and re-fit the nipple. Replace corroded or damaged nipples rather than attempting repair — they cost pennies and a blocked nipple means the component behind it is unlubricated.
Can I use a spray-type chain lube on my baler chain rather than oil?+
Yes — spray chain lubricants are appropriate for open baler chains and have practical advantages over pour-on oil in field application. They penetrate the roller-pin interface effectively, excess spray drips off cleanly, and aerosol application is faster and cleaner than oil can application. Choose a spray chain lubricant that leaves a thin, slightly tacky film rather than a wet, dripping film — the tacky film resists sling-off better during chain rotation. Avoid spray lubricants that contain solvents and leave a dry coating (PTFE dry lubricants) — these are designed for applications where no atmospheric contamination with particles is expected, which is not the case in hay baling. A spray lubricant marketed specifically for agricultural chains is the best choice; general-purpose WD-40 type spray is not a chain lubricant — it is primarily a water dispersant that does not provide adequate film strength for sustained chain lubrication under load.
My baler is new. Do I still need to grease it at every session?+
Yes — a new machine requires correct lubrication from the first session. New bearings and sliding surfaces are breaking in during the first 500–1,000 bales of service: the contact faces are microscopically rough from machining and they wear to a smoother fit during initial operation. This break-in wear generates more heat and more metal debris than steady-state operation — making adequate lubrication during break-in particularly important for removing this debris from the bearing surfaces and maintaining an oil film during the higher-heat break-in period. Neglecting lubrication during the first season of a new machine sets the wear baseline higher than it should be and shortens the first component replacement intervals. The first pre-season service on a new machine after its first season should also include a gearbox oil change — the initial oil will contain break-in metal particles regardless of how short the break-in period was.
How many strokes of the grease gun should I apply to each fitting?+
For fittings lubricated at each session (pickup hub bearings, cam followers): 1–2 strokes of a standard lever-type grease gun per session is correct. This replenishes the small amount lost or degraded from the previous session without overfilling the cavity. For fittings that were missed for several sessions: 3–4 strokes to replenish the depleted supply, then return to 1–2 strokes per session thereafter. For the annual full service where all fittings receive attention: 2–3 strokes per fitting, then move on. Stop pumping when you feel a slight increase in resistance from the gun — this indicates the cavity is full and further strokes begin forcing grease past seals. Grease gun volume varies significantly by type: a lever gun typically delivers 1.4 grams per stroke; a pistol-grip gun may deliver 0.7 grams. This difference matters when following manufacturer specifications given in grams — check your gun output if using a quantity-based specification.
Should I grease the baler in winter storage or only at the pre-season service?+
Both — grease at end of season before storage and again at the pre-season service. The end-of-season greasing serves a different purpose from the service greasing: its primary function is corrosion protection over the storage period, not lubrication for operation. Fresh grease displaces any moisture that has entered bearing cavities during the season and provides a protective film over metal surfaces that prevents rust formation during the wet-cold winter storage period. Without this end-of-season greasing, bearings that appear functional at the last baling session can develop internal surface rust during storage — visible as a pitting pattern on bearing races when inspected at the pre-season service. The pre-season service greasing then adds the operational quantity of fresh lubricant before the first baling session. These are two separate and both necessary greasing events with different objectives.
What signs indicate a bearing is failing due to inadequate lubrication?+
The progression of a bearing failing from inadequate lubrication follows a consistent sequence: Stage 1 — grinding or gritty resistance when the shaft is rotated by hand at rest. The metal surfaces are in contact and producing fine metal particles with each rotation. Stage 2 — audible noise at operating speed. A grinding or rumbling sound from the bearing location that is not present on adjacent components. Stage 3 — heat generation. The bearing runs noticeably warm to the touch within 15–20 minutes of operation. Excessive heat indicates the metal-to-metal contact has progressed to the point where friction energy is significant. Stage 4 — play development. As the bearing inner or outer race wears, radial play increases — the shaft wobbles. Stage 5 — sudden failure. The cage or race fractures and the shaft seizes or runs with extreme play. Catch the problem at Stage 1 or 2 — a bearing identified at Stage 1 can often be extended with immediate intensive greasing and replacement at the next planned service. A bearing at Stage 4 or 5 is an immediate replacement requirement before the next baling session.
Is there a difference in the lubrication requirements for hot vs cold climates?+
The lubrication frequency requirements are the same regardless of climate — the number of baling cycles per session determines the lubrication interval, not the temperature. However, the grease type selection has minor climate-related considerations. In very hot operating conditions (above 45°C ambient during peak summer baling in desert or arid regions), a high-temperature EP lithium complex grease rated for extended high-temperature performance provides better protection than standard Grade 2 EP grease, which can soften and migrate out of bearing cavities at sustained high temperatures. In very cold climates where the machine is started below -10°C: standard Grade 2 EP grease stiffens at low temperatures and may not flow adequately to lubricate the bearing surfaces during the first few minutes of cold operation. A Grade 1 or Grade 0 EP grease in the most critical fittings (hub bearings) provides better cold-start lubrication in sub-zero storage conditions. These climate-specific selections are refinements rather than fundamental changes — standard EP Grade 2 is appropriate for the vast majority of baling conditions across the U.S.
Do I need to lubricate anything on a new baler before the first session?+
Yes — check the operator manual for the new-machine pre-delivery lubrication requirements. Most 9YF series models are shipped from the factory with a protective oil coating rather than operating grease on some components, and some chain links may be dry of working lubricant from the preservation oil used during transport. Before the first session on a new machine: grease all fittings as per the daily and weekly schedule, even if the machine has just been uncrated. Apply oil to the open drive chain. Check the gearbox oil level — the factory fill may be slightly below the operating level after the machine has been positioned at an angle during shipping. Run the machine through one manual rotation cycle (PTO disconnected) and listen for any dry mechanical sounds before the first PTO-engaged test. This 15-minute pre-first-session check prevents the situation where the first session runs with a dry bearing from the shipping period.
Get the Right Grease Specification for Your 9YF Model
Contact us with your square baler and serial number and we will confirm the correct grease type, gearbox oil specification and interval schedule for your specific machine, and answer any lubrication question specific to your operating conditions.
संपादक: सीएक्सएम
