Triumph TR6 PI Operation Manual page 250

OVERDRIVE 'A' TYPE
FAULT DIAGNOSIS AND RECTIFICATION
Fault
Possible Cause Remedy
a. Insufficient oil in unit
Top up gearbox/overdrive
b. Solenoid not energizing Check circuit
c. Solenoid energized
~
not operating
Test and adjust. 40.22.01
d.
Insufficient hydraulic pressure due to pump
OVERDRIVE non-return valve not seating Re-seat valve. 40.16.10
DOES NOT e.
Insufficient hydraulic pressure due to worn
ENGAGE accumulator Overhaul unit. 40.20.10
f Choked filter
Clean filter. 40.10.01
g.
Pump damaged Remove and check. 40.18.01
h. Operating valve leaking Re-seat valve. 40.16.0 I
j. Internal damage Overhaul unit. 40.20.10
a.
Fault in electrical control circuit Check circui t
*OVERDRIVE b. Choked jet in operating valve Check valve. 40.16.01
DOES NOT
c.
Solenoid/lever incorrect Test and adjust. 40.22.01
RELEASE d. Sticking clutch
See note
t
e. Internal damage
Overhaul unit. 40.20.10
a.
Insufficient oil in unit Top up gearbox/overdrive
CLUTCH b. Solenoid lever out of adjustment Adjust. 40.22.01
SLIP IN
c. Insufficient oil pressure due to pump non-
OVERDRIVE return valve not seating
Re-seat valve. 40.16.10
d. Insufficient oil pressure due to worn accumu-
lator Overhaul unit. 40.20.10
CLUTCH SLIP
a.
Solenoid lever out of adjustment Adjust. 40.22.01
IN REVERSE b.
Partially choked restrictor jet in operating
AND FREE- valve.
Check valve. 40.16.01
WHEEL ON
c.
Solenoid stop incorrectly set Adjust. 40.22.0 I
OVER-RUN
*CAUTION: If. for any reason, the overdrive cannot be released do not reverse the vehicle as severe· internal damage will
result.
t
NOTE: When a clutch is sticking on a new vehicle the probable cause is the linings not having bedded in sufficiently to
release. Where this occurs the linings may usually be parted by striking the brake ring sharply with a hide mallet.
DATA
Clutch movement from direct to overdrive
Hydraulic operating pressure
Ratio
Il'iulllrh TR(J Manual. Part
I"P.
545277
)""UL'
I
0'110
to
0'120 in
410 to 430 Ib/in
2
22'1(
40.00.02A.