Part of the Yanmar Parts Manuals.
Pull the fuel injection pump off a 4TNV88-XMS and you are one wrong part number away from an engine that sits on the stand for weeks. This Yanmar parts catalog, publication 0CV10-G94800, is how you order right the first time. It covers the standard 4TNV88-XMS and the GEHL-spec variant of the same engine.
Every major assembly gets an exploded diagram with factory part numbers: cylinder block, cylinder head and bonnet, crankshaft and pistons, camshaft and gears, lube oil and cooling water systems, injection pump, injectors, fuel lines, starting motor, generator, gasket set, and short block. When you are alone with a stripped engine and nobody to ask, matching the part in your hand to a numbered diagram beats guessing at a counter.
At 25 pages and under a megabyte, the bookmarked PDF goes wherever the engine is: phone at the bench, or printed and laid out beside the block.
What's Inside This Yanmar 4TNV88-XMS (GEHL) Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Preface. | 2-3 | - |
| Content. | 4 | - |
| Cylinder Block | 5 | Cylinder Block Assy, Camshaft Bush, Main Bearing Set, Thrust Metal, Cylinder Head Gasket, Spacer, Main Metal |
| Gear Housing | 6 | Gear Housing Assy, Oil Seal, Pump Cover Assy, Lub. Oil Pump Cover, Relief Valve, Spring, Gear Case Frange, Filler Cover |
| Flywheel Housing & Oil Sump | 7 | Flywheel Housing, Flywheel Cover Cap, Oil Sump Spacer, Lub. Oil Sump Assy, Oil Seal Case Assy, Oil Seal, Liquid Gasket |
| Cylinder Head & Bonnet | 8 | Cylinder Hed Assy, Valve Guide, Intake Valve, Exhaust Valve, Valve Spring, Spring Retainer, Valve Stem Seal, Valve Cap |
| Suction Manifold | 9 | Breather Pipe, Int Manifold, Int.manofold Gasket, Air Heater, Air Heater Gasket, Gasket, Bend |
| Exhaust Manifold | 10 | Exhaust Manifold Gasket, Silencer Gasket, Bolt |
| Camshaft & Driving Gear | 11 | Tappet, Push Rod, Camshaft Assy, Thrust Metal, Camshaft Gear, Idle Gear Shaft, Idle Gear Assy, Idle Gear Bush |
| Crankshaft & Piston | 12 | Crankshaft Assy, Crankshaft Gear, Crankshaft V-pulley, Flywheel Assy, Ring Gear, Piston Assy, Piston Ring Set, Connecting Rod Assy |
| Lub.Oil System | 13 | Lub. Oil Dipstick, Dipstick Guide, Gasket, Oil Inlet Pipe Assy, Lub. Oil Switch, Lub. Oil Pipe Assy, Joint Bolt Assy, Oil Cooler Assy |
| Cooling Water System | 14 | Water Pump Assy, Gasket, Plate, Joint, Thermo. Case Gasket, Cooling Water Pump V-pulley, V-belt A37, Cock Assy |
| Fuel Injection Pump | 15 | Fip Support, Injection Pump Assy, Bolt |
| Fuel Injection Valve | 16 | Fuel Injector, Nozzle Assy, Nozzle Holder Assy, Nozzle Spring, Nozzle Spring Seat, Stop Plate, Injection Pipe Retainer, Retainer |
| Fuel Line | 17 | Filter Bracket, Fuel Filter, Fuel Pipe, Tube, Fuel Oil Pipe, Fo-t Cmp, Fuel Pipe Protector, Fuel Feed Pump Assy |
| Starting Motor | 18 | Starter, Pinion Shaft, Armature Assy, Field Coil Assy, Brush, Rear Cover, Brash Holder Assy, Brush Spring |
| Generator | 19 | Belt Adjuster, Rotor Assy, Bearing Cover, Drive Flame Assy, Plate, Rear Flame Assy, Cover |
| Gasket Set | 20 | Cylinder Head Gasket, Valve Stem Seal, Nozzle Protector, Nozzle Seat, Cover Gasket, Exhaust Manifold Gasket, Thermo. Case Gasket |
| Short Block | 21 | Short Block Assy, Cylinder Block Assy, Oil Seal Case Assy, Tappet, Camshaft Assy, Crankshaft Assy, Piston Assy, Connecting Rod Assy |
Yanmar 4TNV88-XMS (GEHL) Common Problems This Manual Covers
Engine running on three cylinders
A dead cylinder on this engine often traces to an injector that is sticking or flowing wrong, and owners report that swapping injectors does not always move the miss. The Fuel Injection Valve section gives the exploded view and part numbers to order a correct replacement instead of guessing.
Manual Section: Fuel Injection Valve p. 16Hard starting in cold weather
Cold no-starts frequently come back to the intake heater rather than the pump. The Suction Manifold section lists the heater along with the intake manifold, gasket, breather pipe, and clamps, so the whole preheat path can be ordered in one pass.
Manual Section: Suction Manifold p. 9Head gasket failure
Coolant in the oil or compression bleeding between cylinders means the head comes off. The Gasket Set section lists the non-asbestos set including the cylinder head gasket, valve stem seals, and injection pump O-ring, so everything needed for reassembly arrives in one order.
Manual Section: Gasket Set p. 20Low oil pressure warning
A flickering oil light is often the pressure switch rather than the pump, but ruling that out takes the right part in hand. The Lub.Oil System section covers the oil pressure switch, oil filter, oil cooler assembly, dipstick, and oil pipes by number.
Manual Section: Lub.Oil System p. 13Overheating from pump or thermostat
A tired water pump or a stuck thermostat will cook a small diesel quickly. The Cooling Water System section identifies the water pump assembly and thermostat so the cooling side goes back together with factory parts.
Manual Section: Cooling Water System p. 14Slow cranking or no crank
Starters are among the most commonly replaced parts on the 4TNV88 series. The Starting Motor section breaks the starter down so you can match your unit before ordering a replacement or rebuild parts.
Manual Section: Starting Motor p. 18Charging failure or thrown belt
A glazed belt or a dead regulator leaves the battery flat by morning. The Generator section lists the belt, adjuster, rotor assembly, bearings, and regulator assembly individually, so a charging fault does not automatically mean buying a complete unit.
Manual Section: Generator p. 19Frequently Asked Questions
Which engines does this parts catalog cover?
It covers the Yanmar 4TNV88-XMS and the 4TNV88-XMS (GEHL) variant, under Yanmar publication number 0CV10-G94800. Check the designation on your engine's ID plate against these before ordering parts from it.
Does it include torque specs or repair procedures?
No. This is a parts catalog: exploded diagrams and factory part numbers for identifying and ordering components. Pair it with a service manual for teardown procedures, clearances, and torque sequences; use this book to get the right parts on the bench.
Are fuel system part numbers listed?
Yes. Separate sections cover the Fuel Injection Pump, Fuel Injection Valve, and Fuel Line, so the pump, injectors, and lines can each be identified and ordered by factory part number. p. 15
Is a complete short block available through this catalog?
Yes. The Short Block section lists the short block along with the cylinder block, crankshaft, camshaft, and piston assemblies it comprises, which matters when the bottom end is past saving and a rebuild no longer makes sense. p. 21
How quickly can I access this manual?
You get a 25-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print just the pages I need from this Yanmar 4TNV88-XMS manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
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