Problems
Causes
Countermeasures
8.Pump noise
1) Partially clogged suction filter or
suction piping.
Clean.
2) Air inhaled through suction
piping and intake pipe connections
for pump
Inspect and retighten.
3) Loosened pump cover tightening
bolts.
Inspect and retighten
4) Too rich oil viscosity
Replace with fluid of adequate
viscosity.
5) Broken or worn pump parts
Inspect and replace defective parts.
9.Excessive
wear,deflection or
damage of pump
1) Dirty fluid
Eliminate foreign matter and inspect
filters.
2) Circuit pressure exceeds pump
capacity
Adjust relief valve or replace if
necessary
3) Oil-less operation due to
Insufficient oil quantity
Inspect transmission oil level and
maintain specified oil level by
replenishing.In either case,clean, and
repair pump parts and replace
damaged ones if necessary.
10.Oil leaks
Broken or fatigues oil seal or
Replace
9-35
10.Oil leaks
outside pump
Broken or fatigues oil seal or
O-ring
Replace
11.Oil leaks from
piping or joints
Poorly connected piping
Inspect,clean,and eliminate dust.
Repair flaws with oil stone if
necessary. Retighten.
Poor O-ring
Replace
Broken piping
Replace with a new one after washing
clean related parts.
12.Oil leaks
around lift arm
Poor oil seals
Replace oil seal or bushing if
necessary
13.Independent
PTO clutch slips or
is too slow in
engaging
1) Clogged fixed orifice of Flow
divider
Disassemble and wash clean.
2) Port B regulated pressure is too
slow
Inspect and reset pressure
3) Clogged PTO pressure control
valve or stuck
Disassemble and wash clean.
Repair flaws with oil stone if
necessary or replace with a new one.
4) Poor flow divider solenoid
valve
Disassemble and repair or replace
with new one if necessary .
Summary of Contents for T233 HST
Page 14: ...1 11...
Page 15: ...1 12...
Page 22: ...SECTION 3 GEAR TRAIN DIAGRAMS FIG 1 3 GEAR TRAIN DIAGRAM 1 19...
Page 33: ...SECTION 2 OPERATION CHART FOR DISASSEMBLY AND REASSEMBLY BY MAJOR BLOCKS 2 4...
Page 60: ...3 HST main pump case 4 5...
Page 64: ...6 Hydrostatic system schematic 4 8...
Page 100: ...3 Rear transmission case 5 15 Fig 5 23...
Page 121: ...Power Train Diagram Fig 5 60 5 36...
Page 210: ...SECTION 6 WIRING DIAGRAM 10 12...
