Triumph TR6 PI Operation Manual page 256

OVERDRIVE ASSEMBLY
- Hydraulic pressure test
40.20.01
OVERDRIVE ~A' TYPE
Service tool: U88
1. Remove the gearbox tunnel cover - 17.01
2. Switch ignition ON, top gear, overdrive IN and OUT
six times.
3. tie socket and extension to remove operating valve
plug.
4. Fit hydraulic test gauge tool U88 to operating valve
orifice.
5. Road-test or jack up vehicle and run engine with ans
without overdrive.
6. Note the gauge reading which should be 410 to 430
Ib/in
1
.
7. Switch engine off, ignition on, top gear, overdrive in
and out six times to dissipate oil pressure.
8. Remove gauge, refit operating valve plug.
9. Fit rubber grommet and front console tray.
NOTE: Lack of oil pressure when overdrive selected may
indicate a fault in the pump non-return valve.
40.16.10.
Lack of oil pressure when overdrive not selected may
indicate a fault in the operating valve. 40.16.01.
Triumph TR6 Manual. Part No. 545277 Issue 1
4- 8
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4O.20.01A