Track down the exact factory replacement numbers for your crawler backhoe with this 266-page Yanmar B37-2B, 3TNE88-B1 parts catalog PDF. Inside, you get detailed exploded views for every machine system, from the heavy-duty boom cylinder down to the complete electrical wiring harness. Open to clear component breakdowns showing precise part numbers and hardware sizes for the hydraulic oil pump, drive motors, control valves, and complete swing assembly. Match your replacement pistons to the exact 88 x 90 mm bore and stroke of the factory 3TNE88-B1 engine before you ever call the dealer. Stop ordering the wrong components based on aftermarket website guesswork. Grab this bookmarked file, pull up the exploded diagram on your shop tablet, and order the correct part on the very first try.
What's Inside This Yanmar B37-2B Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Tool | - | Set, Wrench, Driver, Screw, Plier, Grease Gun |
| Kit Parts for Remodel | - | Decelerate Kit, P.T.O. Kit, Multi Valve Kit, 2-Way Valve Kit |
| Radio | - | Assy, Antenna, Harness, Cover Assy, Stay Assy |
| Cabin Door | - | Door Assy, Hinge, Key Assy, Cylinder, Lock Assy, Glass, Seal |
| Canopy | - | Assy, Pole Assy, Roof, Spring Washer, Bolt |
| Heater & Defroster | - | Heater Asy, Switch, Heater, Hose, Valve, Defroster Assy, Nozzle |
| Hyd. Oil Tank | - | Joint, Connector, Flange, O-Ring, Element, Gauge, Oil Level |
| Work Lamp | - | Lamp, Work, Wire, Bulb, Cover, Washer, Bolt |
| Arm Cylinder | - | Cylinder Assy, Piston, Head, Rod Comp, Seal Set, Nipple B, Grease |
| Swing Cylinder | - | Cylinder Assy, Tube W/BUSH, Bush, Seal, Dust, Head, Piston |
| Arm & Bucket Link | - | Bucket, Cutter, Bolt, Nut, Teeth Assy, Pin Assy |
| Blade | - | Bush, Seal, Dust, Pin, Plate, Lock |
| Blade Cylinder | - | Cylinder, Blade, Bush, Seal, Piston, Head |
| Bucket Cylinder | - | - |
| Muffler | - | Extension Pipe, Clamp, Washer, Bolt, Nut |
| Air Cleaner | - | Hose, Band, Clamp |
| Engine Mount | - | Absorber, Shock, Engine Bed, Bracket, Seat Spring, Bolt |
| Fuel Tank & Fuel Line | - | Fuel Tank, Cock, Fuel Gauge Unit, Gasket, Fuel Cap, Fuel Filter |
| Hyd. Oil Pump & Joint | - | Boom Cylinder, Piston, Head, Bush, Rod Comp, Seal Kit |
| Lub. Oil Cooler | - | Oil Cooler, Washer, Spring Washer, Bolt, Nut |
| Roller & Adjust | - | Sprocket, Idler, Plug, Seal, Bearing, Circlip |
| Swivel Joint | - | Swivel Shaft, Swivel Flange, Swivel Hub, Swivel Spacer, Swivel Seal Kit |
| PTO Valve | - | Assy, Tie-Rod, Spool Section, O-Ring, Wiper, Bolt |
| Greasing | - | Rubber, Bush, Seal, Pin, Shim, Grease Nipple |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Model Name | B37-2B | p. 2 |
| Engine Model | 3TNE88-B1 | p. 2 |
| Bore × Stroke | 88 × 90 mm | p. 2 |
Yanmar B37-2B Common Problems This Manual Covers
Yanmar B37-2B crawler backhoe hydraulic functions become weak and erratic under load.
Inspect the hydraulic parts diagram. Locate the exploded view for the pump assembly to identify the correct seal kit and bearing part numbers. Verify compatibility with the 88 × 90 mm bore and stroke engine configuration before ordering replacement components to ensure proper fitment.
Manual Section: Hyd. Oil Pump & JointEngine loses power or stalls out completely during heavy digging operations in the trench.
Check the fuel system exploded view to find the correct water separator element and fuel cock part numbers. Cross-reference the identified fuel filter assembly with the parts number list. Order the exact factory gasket and O-rings shown to handle fuel flow for the 88 × 90 mm bore engine.
Manual Section: Fuel Tank & Fuel LineHydraulic oil level drops and visible external leaks appear around the stick cylinder gland.
Inspect the boom and attachment parts diagram. Identify the exact seal set and rod comp part numbers for the arm cylinder. Verify all replacement O-rings match your machine before ordering, since the 88 × 90 mm bore and stroke engine provides high flow requiring correct factory seals.
Manual Section: Arm CylinderElectrical display or boom work lights do not illuminate during night operation.
Trace the standard electrical system wiring diagram. Identify the correct replacement bulb, wire harness, and switch part numbers for the work lamp. Order the exact factory cover and washer assemblies listed to keep moisture out of the 88 × 90 mm bore and stroke engine bay.
Manual Section: Work LampFrequently Asked Questions
How do you fix yanmar B37-2B crawler backhoe hydraulic functions become weak and erratic under load?
Inspect the hydraulic parts diagram. Locate the exploded view for the pump assembly to identify the correct seal kit and bearing part numbers. Verify compatibility with the 88 × 90 mm bore and stroke engine configuration before ordering replacement components to ensure proper fitment.
How do you fix engine loses power or stalls out completely during heavy digging operations in the trench?
Check the fuel system exploded view to find the correct water separator element and fuel cock part numbers. Cross-reference the identified fuel filter assembly with the parts number list. Order the exact factory gasket and O-rings shown to handle fuel flow for the 88 × 90 mm bore engine.
How do you fix hydraulic oil level drops and visible external leaks appear around the stick cylinder gland?
Inspect the boom and attachment parts diagram. Identify the exact seal set and rod comp part numbers for the arm cylinder. Verify all replacement O-rings match your machine before ordering, since the 88 × 90 mm bore and stroke engine provides high flow requiring correct factory seals.
How do you fix electrical display or boom work lights do not illuminate during night operation?
Trace the standard electrical system wiring diagram. Identify the correct replacement bulb, wire harness, and switch part numbers for the work lamp. Order the exact factory cover and washer assemblies listed to keep moisture out of the 88 × 90 mm bore and stroke engine bay.
What do I get after purchasing this Yanmar B37-2B, 3TNE88-B1 manual?
Instant PDF download. You get the full 266-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print this manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Are there wiring harness diagrams in this Yanmar B37-2B, 3TNE88-B1 manual?
Included. The Yanmar B37-2B, 3TNE88-B1 Parts Catalog provides a wiring diagram for the electrical system.
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