MAINTENANCE
3-15
235 MM331 (3--93)
HYDRAULIC COMPONENTS TROUBLESHOOTING
Problem
Cause
Remedy
Hydraulic cylinder failure
Piston seals leaking
Install seal kit
Hydraulic cylinder failure
Barrel worn or rod bent
Replace cylinder rod
Hydraulic control valve failure
Valve seals leaking
Install seal kit
Hydraulic control valve failure
Relief valve stuck open (leaking)
Clean or replace relief valve
Hydraulic motor failure
Motor leaking
Install seal kit
Hydraulic motor failure
Drive link failure
Replace drive link
Gerotor worn
Replace gerotor set
Output shaft failure
Replace output shaft and bearings
Hydraulic gear pump failure
Pump leaking
Install seal kit
Hydraulic gear pump failure
Gear set failure
Replace gear set
Shaft failure
Replace gear set
Hydraulic piston pump failure
Pump leaking
Install seal kit
Hydraulic piston pump failure
Relief valve stuck
Clean or replace relief valve
Integral charge pump failure
Replace charge pump
Rotating group worn
Replace rotating group
Shaft failure
Replace shaft
Backplate worn
Replace backplate
Engine-to-pump coupling failure
Replace coupling
Summary of Contents for 235D
Page 1: ...235D MM331 ...
Page 6: ...ABOUT THIS MANUAL 235 MM331 3 93 d ...
Page 14: ...SPECIFICATIONS 235 MM331 3 93 1 2 ...
Page 18: ...SPECIFICATIONS 235 MM331 3 93 1 6 ...
Page 20: ...OPERATION 235 MM331 3 93 2 2 ...
Page 36: ...OPERATION 235 MM331 3 93 2 18 ...
Page 38: ...MAINTENANCE 235 MM331 3 93 3 2 ...
Page 49: ...MAINTENANCE 3 13 235 MM331 3 94 03460 HYDRAULIC SCHEMATIC ...
Page 60: ...MAINTENANCE 235 MM331 3 94 3 24 03490 ELECTRICAL SCHEMATIC ...
Page 61: ...MAINTENANCE 3 25 235 MM331 3 94 03490 ELECTRICAL SCHEMATIC AUXILIARY SIDE BRUSH ...
Page 78: ...MAINTENANCE 235 MM331 3 94 3 42 ...
Page 80: ...APPENDIX 235 MM331 3 93 4 2 ...
Page 84: ...STANDARD MODEL PARTS 235 MM331 3 93 5 2 ...
Page 134: ...STANDARD MODEL PARTS 235 MM331 3 94 5 52 4 2 3 1 Fig 29 Wire Harness Group ...
Page 138: ...OPTIONS 235 MM331 3 93 6 2 ...
Page 152: ...HYDRAULIC COMPONENTS 235 MM331 3 93 7 2 ...
Page 164: ...ENGINE PARTS DIESEL 235 MM331 3 93 8 2 ...