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Massey Ferguson TE-20 tractor factory workshop and repair manual download

Tools & consumables (minimum)
- Metric/imperial socket & spanner set (1/4"–3/4"), extensions, breaker bar
- Torque wrench (range covering pump/gearbox bolts)
- Screwdrivers, pliers, snap‑ring pliers
- Gear/axle puller (3‑jaw or slide hammer with appropriate adapters)
- Ball/roller bearing driver set or hydraulic press (for bearings/seals)
- Seal driver / drift set and small mallet
- Gasket scraper, wire brush, brake cleaner or parts solvent, rags
- Dial indicator or feeler gauges (for end-play/clearance checks)
- Pick-up magnet, flashlight
- Drain pan, funnel, clean oil containers
- New gearbox oil, gasket sealant (RTV), threadlocker (medium)
- New transmission pump assembly or rebuild kit (pump gears, body gasket, seals, O‑rings, bearings if worn)
- New gearbox cover gasket(s) or RTV, replacement bolts if damaged
- Safety gear: gloves, eye protection, hearing protection
- Wheel chocks, floor jack and jack stands (if you must raise tractor), blocks

Safety precautions
- Work on a flat, level surface; chock wheels and apply parking brake.
- Disconnect battery and remove ignition lead(s) or spark plug connector(s) so engine cannot crank.
- Support tractor with jack stands if lifted; never rely on jack alone.
- Drain hot oil only after engine has cooled. Dispose oil per regulations.
- Keep hands clear of heavy parts; use correct lifting technique or hoist for heavy assemblies.
- Use eye protection when cleaning, prying, or press-fitting parts.

Overview / notes
On a Massey Ferguson TE‑20 the transmission oil pump is an internal, gear‑type pump located in the gearbox/housing and driven off one of the layshaft/gears. Replacement usually requires opening the gearbox or removing the gearbox cover to access the pump assembly, removing the drive gear/shaft and any seals, fitting a new pump (or rebuild kit) and reassembling. Have the service manual for torque specs and gear clearance figures — do not rely on guessed torque values.

Step‑by‑step procedure

1) Preparation
- Park tractor on level ground, chock wheels, disconnect battery and ignition lead.
- Clean around gearbox area so contaminants do not enter when cover is removed.
- Place drain pan beneath gearbox.

2) Drain gearbox oil
- Remove drain plug(s) and drain gearbox oil completely. Keep drain pan clean if you intend to reuse oil briefly for testing (best practice is to use fresh oil upon reassembly).
- Clean drain plug and magnet; inspect for excessive metal flakes.

3) Remove ancillary components to access gearbox cover
- Remove gearshift lever covers and linkages to gearbox top as required.
- Remove PTO drive/cover plates, speedometer drive or any obstructions to the gearbox top or rear cover per manual. Keep track of small parts/keys/springs.
- On TE‑20 you may need to remove top cover or backplate to expose internals — remove bolts in a methodical pattern to avoid distortion.

4) Remove gearbox or cover to access pump
- Unbolt gearbox inspection cover or housing section that hides the pump. Support heavy covers as you remove bolts.
- Note orientation of gaskets and the location of dowels or locating pins. Mark parts if necessary to ensure correct reassembly orientation.

5) Locate pump, inspect and document
- Identify pump body, drive gear/shaft, pick‑up, and suction/pressure ports. Photograph orientation and linkage to gears if helpful.

6) Remove pump assembly
- Remove any retaining bolts or snap rings holding pump or pump cover.
- If pump drive gear is pressed to shaft, use a gear puller to pull the drive gear and then withdraw pump body. Use care not to damage gear teeth or shaft.
- Note and collect thrust washers, shims and differential spacers — pump endplay shims are critical to correct clearance.

7) Disassemble pump (if rebuilding) or prepare new pump
- If you are rebuilding: remove pump gears carefully, inspect for scoring, pitting, excessive wear. Replace gears and seals with kit.
- Press out seals and bearings as required using a press or appropriate driver. Use new bearings/seals where necessary.
- If fitting a new pump assembly, check that mating surfaces are clean and new gaskets/seals are available.

8) Inspect gearbox internals
- Inspect drive gear(s), layshaft, bearings, and housing for wear or scoring. Replace any components that show excessive wear. Check bearing play and splines.
- Clean all mating surfaces thoroughly with solvent; ensure no dirt or old gasket remains.

9) Install pump
- Fit new seals and bearings into pump housing with seal driver or press; seal lip towards oil side.
- Reassemble pump gears with correct orientation and any thrust washers/shims as per service manual. Lightly lubricate with clean gear oil before assembly.
- If pump drive gear is separate, align splines and press or fit gear onto shaft. Use threadlocker on retaining bolts if specified.
- Reinstall pump assembly into gearbox housing. If endplay or clearance shims are required, set them to factory specified clearance using feeler gauges or dial indicator (critical). Tighten retaining bolts evenly to specified torque.

10) Reassemble gearbox cover and ancillary components
- Replace cover gasket or use RTV to factory spec. Reinstall gearbox cover bolts in a cross pattern to specified torque.
- Refit linkages, levers, covers, and any removed components in reverse order, reinstalling any new gaskets/ seals on covers.

11) Refill gearbox oil
- Refill with the correct type and quantity of transmission oil recommended for TE‑20. Use clean funnel and new filter or mesh if applicable.
- Reconnect battery/ignition leads.

12) Test & final checks
- Start engine and run at idle; cycle transmission through gears slowly. Listen for unusual noises. Check for leaks around pump area and cover.
- Check oil level again after initial running and top up to specification.
- After a short test drive under light load, recheck for leaks and final oil level.

Common pitfalls & how to avoid them
- Incorrect seal orientation: Always fit seals with the lip facing the fluid side. If unsure, consult the manual.
- Losing or misplacing shims/thrust washers: These control pump endplay and clearance. Mark and keep them in order; measure endplay before removal so you can restore the same setting if reusing shims.
- Reusing damaged gaskets or seals: Always replace gaskets/seals on reassembly. Old seals will leak.
- Contamination of internals: Work clean, cover open housings and inspect all parts for debris. Even small particles shorten pump life.
- Over/under torqueing bolts: Use a torque wrench and manufacturer specs. Uneven or over‑torqued cover bolts can warp mating surfaces and cause leaks.
- Not checking mating gears/bearings: A worn driving gear or bearing will destroy a new pump. Inspect and replace worn parts.
- Pressing parts without proper support: When pressing bearings or gears, support the component correctly to avoid damage.
- Failing to replace oil: Old oil may be contaminated; replace with correct grade and quantity.

Replacement parts typically required
- New pump assembly OR pump rebuild kit (gears, inner seals)
- Pump housing gasket and gearbox cover gasket(s)
- Shaft seals (output & input seals)
- Bearings (if worn or recommended in rebuild kit)
- O‑rings, small fasteners as needed
- New transmission oil

How specific tools are used (quick summary)
- Gear/axle puller: removes drive gear from shaft without damaging gear teeth; center the puller and apply steady force.
- Bearing driver/press: drives bearings/seals squarely into bores; use correct diameter driver to avoid crushing bearing.
- Snap‑ring pliers: remove/install snap rings retaining gears or bearings.
- Torque wrench: tighten bolts to specified torque — use cross patterns on covers.
- Dial indicator/feeler gauge: measure pump gear endplay and clearances; dial indicator preferred for precision.

Final check
- After road/test run, re‑inspect for leaks, re‑torque cover bolts if required, and recheck oil level. Monitor for noise or excessive temperature over first hours of operation.

If you need specific torque figures, endplay values, or exploded diagrams for TE‑20 internals, consult the TE‑20 factory/service manual for those exact numbers.
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