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TES]1NG AND ADJUSTING
DPS
transmission
Complaint
I
Possible cause
Remedy
Machine does not move in one or
A.
Low
oil pressure
more speeds or all clutches slip.
(1) Not enough oil
Refill.
(2) Loose, broken or maladjusted
Repair or readjust.
control linkage
(3) Gear pump or its drive defective
Overhaul or replace.
(4) Air being sucked into pump
Check packed joint in pump
suction and repair or replace.
(5)
Internal
oil leakage in control
Disassemble and repair or replace
valve due to wear or failure of
defective parts.
sealing members such as piston
seals and 0-rings
(6) Main relief valve internally dirty
Overhaul. Correct its pressure
with foreign matter stuck in
setting.
sliding clearance, or out of
adjustment
(7) Oil viscosity too low
Use Class CD oil (engine oil) of
API classification, whose viscosity
:
rating is
SAB lOW.
B. Mechanical failure
(1) Transmission shaft damaged
Disassemble and replace.
(2)
Seized
or bound clutch piston,
Disassemble, repair or replace.
friction plates or mating plates,
resulting in reduced clutch
capacity
(3) Friction plates or mating plates
Disassemble and replace.
worn or damaged
(4) Beyel gears or other gears
Disassemble and replace.
defective
C. Neutral safety valve malfunctions
Overhaul or replace.
Machine jolts on shifting.
(1) Accumulator valve not working
Disassemble and repair or replace.
properly
(2) Oil viscosity
too
high
Change with oil of proper viscos
ity.
V
Slow response of transmission
(1) Clogged orifice in control valve
°
Disassemble and clean.
V
to shifting.
(2) Not enough oil
Refill.
(3) Control linkage maladjusted
Readjust.
(4) Air being sucked into gear pump
Retighten or replace packing.
due to loose packed joint in
suction line
(5) Faulty seal ring on clutch piston
Disassemble and replace.
(6) Damaged 0-ring in path of oil to
Disassemble and replace.
clutch piston
52
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