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Massey Ferguson MF35 tractor factory workshop and repair manual download

- Safety first
- Wear safety glasses, gloves, and steel-toe boots; gearbox work involves heavy parts, hot oil, sharp edges.
- Work on a flat, level surface; chock wheels, disconnect battery, and support tractor securely on axle stands rated for the load.
- Use jack stands or an engine hoist for any lifted components; never rely on a hydraulic jack alone.

- Important clarifying note (read before starting)
- The Massey Ferguson MF35 uses a manual gearbox (not an automatic). If your tractor is stock MF35, the procedure is a manual transmission (clutch/gearbox) overhaul/repair. If your machine is a custom or different model with an automatic unit, these instructions will not fully apply.
- Always get the factory workshop manual for your exact serial range before disassembly — torque figures, clearances, and parts numbers are model/serial-specific.

- Symptoms to identify before tearing down (what indicates gearbox repair is needed)
- Slipping between gears, gears pop out of gear, grinding on selection, excessive noise (whine, growl), visible oil leaks, gear teeth pitting or broken, excessive play in output shaft.
- Note specific symptom(s) — this guides whether you need a simple seal/bearing replacement or a full gearbox strip and gear replacement.

- Tools you likely already have (basic tools) and how to use them
- Combination wrench set (open + box ends)
- Use to loosen/tighten nuts and bolts. Use the box end for final tightening to avoid rounding. Match size precisely.
- Socket set with ratchet and extensions
- Use sockets for faster removal of bolts. Use an appropriate-length extension to reach recessed bolts. Break stubborn fasteners with a longer breaker bar if needed.
- Screwdrivers (flat and Phillips)
- For cover screws, linkage clamps, prying gaskets gently. Use the correct tip size to avoid stripping heads.
- Pliers (slip-joint, needle-nose)
- For hose clamps, cotter pins, retaining clips. Needle-nose for tight spots.
- Hammer and brass/soft-faced mallet
- Use soft-faced mallet to persuade parts without damaging surfaces; steel hammer only for hardy punches and heavily corroded items.
- Punch/drift set (steel)
- Drive out roll pins, alignment. Support around the part to avoid bending shafts.
- Hacksaw or reciprocating saw (if removal requires cutting stuck studs)
- Last resort for seized studs or broken bolts.
- Torque wrench (click type)
- Essential for final reassembly to the correct torque specs in the manual. Set and tighten slowly to the required value.
- Drain pan and funnel
- Collect gearbox oil when draining; funnels and filters for refilling.
- Wire brush and gasket scraper
- Clean mating surfaces before reassembly.

- Extra / specialized tools you will need (and why)
- Service/workshop manual for MF35
- Why: provides exploded diagrams, torque specs, clearances, sequences. Cannot skip.
- Hydraulic engine hoist or gearbox jack
- Why: gearbox and bellhousing are heavy; safe removal requires mechanical lifting.
- Hydraulic press (or bench arbor press)
- Why: to press bearings on/off shafts and to remove tapered bushes. Trying to hammer bearings risks damage.
- Bearing puller / gear puller set
- Why: to remove pressed-on gears and bearings without damage.
- Snap-ring (circlip) pliers (internal and external)
- Why: many shafts retain components with snap rings; essential to remove/install safely.
- Seal puller and seal driver set (or socket of appropriate diameter)
- Why: to remove old oil seals and install new ones squarely to spec.
- Clutch alignment tool
- Why: aligns clutch disc to the splined gearbox input shaft during reassembly so the input shaft can enter the clutch without struggling.
- Dial indicator with magnetic base (for endplay measurement)
- Why: used to measure shaft endplay and bearing preload to factory spec.
- Micrometer / caliper / feeler gauges
- Why: to measure shaft diameters, gear wear, clearances — determines if replacement parts are needed.
- Impact driver / breaker bar and penetrating oil
- Why: for seized fasteners; use penetrating oil first and allow time to soak.
- Magnetic tray and detailed labeling supplies (zip bags, marker)
- Why: to keep bolts/parts organized for correct reassembly.
- Safety stands and engine support bar
- Why: when separating gearbox from engine or removing tractor belly components.

- Preparatory steps (before teardown)
- Read the workshop manual sections on clutch, bellhousing, and gearbox removal for your serial number.
- Drain gearbox oil into a clean container; note oil color and presence of metal shavings (magnetic pickups can show ferrous debris).
- Remove PTO, linkages, selector levers, driveshaft / propshaft, and any external components per manual.
- Label all linkages and take photos of cable/rod routing for reassembly.

- Basic gearbox removal outline (general guidance relevant to MF35)
- Disconnect battery and secure tractor. Support the tractor’s weight; position hoist or jack under gearbox/bellhousing.
- Detach gear selector rod/rails, remote linkages, speedometer drive, and PTO shaft from gearbox.
- Remove bellhousing bolts that attach gearbox to engine; support gearbox with jack/hoist and lower gearbox clear of the engine. Keep splined input shaft aligned to avoid damage.
- Transport gearbox to a clean, well-lit bench.

- Disassembly steps on the bench (high-level, do each step with manual)
- Clean outer casing with solvent to remove grease so dirt doesn’t enter internals when opened.
- Remove cover plates and shift forks/rails, noting orientation. Remove snap rings and mark left/right for forks.
- Remove input/main/layshaft assemblies in sequence, using bearing puller / press as required.
- Inspect all bearings, gears, synchros (if present), bushings, shafts, and snap rings as you remove them. Take photos and notes.

- How to inspect parts and decide replacement
- Bearings
- Inspect for roughness, pitted rollers, looseness, discoloration (overheat). Replace any bearing that feels rough or has play.
- Seals and gaskets
- Always replace seals and gaskets when gearbox is open — old seals will leak once reassembled.
- Gears and teeth
- Look for chipped teeth, pitting, scoring, or excessive wear on tooth faces. Replace any damaged gears or if backlash exceeds manual spec.
- Synchro rings / dogs (if applicable)
- Check for worn or rounded dogs, burnt or glazed friction surfaces. Replace worn synchromesh parts or dog pairs causing hard shifts.
- Shafts
- Inspect for scoring, wear at bearing journals or splines. Minor scoring can sometimes be machined; deep damage requires replacement.
- Bushings and thrust washers
- Check for excessive clearance or wear; replace to restore correct axial play.
- Clutch components (while gearbox off)
- Inspect clutch disc, pressure plate, release bearing, pilot bearing; replace worn clutch disc or a noisy release bearing.

- Common replacement parts for MF35 gearbox jobs
- Full bearing kit (main bearings, layshaft bearings, and needle bearings)
- Oil seals and O-rings (input/output shaft seals, housing seals)
- Gasket set (cover gaskets, bellhousing gasket)
- Thrust washers and bushings
- Selector forks (if bent or excessively worn)
- Gear(s) or full gearset if damaged (rare unless heavy damage)
- Clutch kit (disc, pressure plate, release bearing) — commonly replaced during gearbox removal
- Synchronizer rings or dog rings (if applicable)
- Fastener replacement: studs/bolts that are damaged or stretched

- How to use the specialized tools during reassembly/inspection
- Hydraulic press
- Use to press bearings and gears on/off shafts straight and evenly. Support the shaft in V-blocks and press at the bearing race, not the rollers.
- Bearing puller / gear puller
- Position puller arms behind the bearing/gear shoulder and pull evenly. Use penetrating oil, heat the gear slightly (not the bearing) to help removal.
- Snap-ring pliers
- Insert tips into ring holes and expand or compress as needed; remove rings slowly to avoid them flying out.
- Seal driver
- Place new seal on driver and tap squarely to the correct depth; seals must be flush and undamaged.
- Clutch alignment tool
- Insert through the clutch disc into the pilot bearing and hold while bellhousing is mated so the input shaft slides in easily.
- Dial indicator
- Mount indicator on a fixed point and measure axial endplay of shafts; compare with workshop manual limits and adjust with thrust washers or preload as specified.
- Torque wrench
- Tighten bolts in correct sequence and to specified torque. For final torque, do a controlled, single click to the set value.

- Reassembly principles
- Clean all parts thoroughly; use solvent and lint-free rags; inspect again as you assemble.
- Replace all bearings/seals/gaskets that were removed or noted worn.
- Apply proper assembly grease to bearings and shafts where recommended, but do not contaminate friction surfaces.
- Ensure shift forks and rails are installed with correct orientation and that selector stops are set per manual.
- Check endplay and backlash per manual; adjust with shims/thrust washers where required.
- Refill gearbox with the specified gear oil (most MF35 gearboxes use SAE 80W-90 GL-4 or tractor-specified EP oil) and to the correct capacity noted in the manual.

- When you must call a machine shop or pro
- If gears are cracked/broken, shafts are bent, or you need heat treatment or precision grinding — these require specialist equipment.
- If you lack a press or cannot measure tolerances, have a shop press bearings on and set bearing preload and shaft endplay.
- If you find metal contamination powder or severe wear, get a professional assessment — underlying issues in the gearbox or engine can cause cascading damage.

- Oil and consumables
- Use manufacturer-recommended gearbox oil (commonly SAE 80W-90 GL-4 for older MF tractors). Check manual for capacity and spec.
- Replace drain and fill plugs’ washers if applicable.
- Keep replacement gaskets/seals and a bearing overhaul kit on hand before starting.

- Typical beginner mistakes to avoid
- Reusing worn seals or bearings — leads to repeat leaks/failures.
- Improper torque or lack of torque wrench — leads to loose bolts or damaged threads.
- Not measuring endplay/backlash — can cause premature gear/bearing failure.
- Hasty removal without labeling — causes reassembly errors and linkage problems.

- Final checks after reassembly and reinstalling gearbox
- Verify clutch operation before driving — engagement/disengagement should be smooth.
- Test shift through all gears on stand before connecting PTO/loads.
- Run briefly, check for leaks, unusual noises, and correct oil level after warming and settling.
- Recheck torque on accessible fasteners after first few hours of operation.

- Parts sourcing and recommendations
- Buy an MF35-specific bearing/seal/gasket kit or a complete gearbox overhaul kit from reputable suppliers or dealers; kits save time and ensure correct sizes.
- Keep clutch kit on hand when removing gearbox — replacement is often advisable while bellhousing is off.

- Short checklist to decide scope: quick diagnosis for beginner
- Oil leak only and shifting okay → replace seals/gaskets and top up oil.
- Noise and rough bearings feeling → replace bearings and seals (strip gearbox).
- Gear grinding/popping out → inspect gears/dogs/synchros; likely fork/synchro or gear replacement; full strip required.
- Clutch slipping/noise → replace clutch components when gearbox removed.

- Final note (no chit-chat)
- Get the workshop manual and order a bearing/seal/clutch kit before starting. Use correct tools (especially a torque wrench and press) or get a shop to handle pressing and final measurement if you lack them. Follow safety procedures at all times.
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