Symptom
Possible cause
Remedy
7. No shifting pressure available.
7.1 Direction of engine rotation does not
agree with arrow on transmission
front cover.
7.2 No fluid in the transmission.
7.3 Fine filter is dirty.
7.4 Fluid level in transmission is too low.
7.5 Fluid pump worn out.
7.6 Pump key in input shaft for fluid pump
drive is broken.
7.7 Spring of shifting pressure relief valve
is broken.
7.1 Replace with suitable rotation engine.
7.2 Refill with fluid.
7.3 Replace fine filter.
7.4 Top-up with fluid. In case of loss of
fluid check transmission, cooler and
pipelines for leakage, also refer to
10 through 13.
7.5 Replace control block.
7.6 Remove control block. Replace pump
key, and any other faulty parts.
7.7 Replace control block.
8. Excessive fluid temperature.
8.1 Fluid cooler is too small.
8.2 Excessive fluid in transmission.
8.3 Fluid cooler is dirty on water side.
8.4 Worn fluid pump in control block.
8.5 Faulty piston rings in control block.
8.6 Clutch is slipping.
8.7 Clutch does not open completely due
to worn disc support.
8.8 Clutch does not open completely due
to broken cup springs.
8.9 With fluid cooler in bypass and unfa-
vorable arrangement of pipelines too
little coolant water flows through
bypass to cooler.
8.1 Use a larger fluid cooler.
8.2 Remove excessive fluid with commer-
cialsuction pump.
8.3 Detach coolant water lines and clean
fluid cooler on water side.
8.4 Replace control block containing fluid
pump.
8.5 Remove control block, replace piston
rings. In case of wear in the control
block due to faulty piston rings re-
place control block as well.
8.6 Refer to 3.
8.7 Dismount transmission and clutch, re-
place all faulty parts.
8.8 Dismount transmission and clutch, re-
place all faulty parts.
8.9 Correct bypass pipeline.
9. Water in the fluid, fluid looks milky.
9.1 Fluid cooler faulty.
9.2 High water level in engine compart-
ment, water entering at output shaft
seal.
9.1 Repair leakage at cooler or replace
cooler. Change transmission fluid.
9.2 Remedy cause for water level in en-
gine compartment. Change transmis-
sion fluid.
10. Fluid leakage at input or output
shaft
10.1 Breather clogged with paint or dirt
10.2 Shaft sealfaulty
10.3 Excessive fluid in transmission
10.1 Remove paint or dirt from breather
Replace seal. If seal location on
shaft is worn, regrind.
10.3 Remove excessive fluid with
commercialsuction pump.
11. Fluid leakage at breather.
11.1 Excessive fluid in transmission.
11.1 Pump excessive fluid out with com-
mercialhand pump.
12. Fluid leakage at joints or screw con-
nections.
12.1 Bolts are not tight at the prescribed
torque.
12.2 Loctite not properly spread onto
sealing surface.
12.3 Gasket has been used several
times.
12.1 Tighten bolts to prescribed torque.
12.2 Resealafter removing old Loctite
and cleaning. Finish mating faces
with oilstone.
12.3 Replace gasket.
32
Repair Manualand Spare Parts List
Section 9
