ZF Repair Manual: ZF63IV, ZF80IV, ZF80-1IV
<< Previous of 78 Next >>31
Repair Manual and Spare Parts List
Section 8: Function test
FUNCTION TEST
The function test should be carried out follows:
Motor speed (rpm)
Shift lever position
Durat.
minutes
Test
800-1000
neutral
5
1, 2
600-800 (idling speed)
A<->B
position repeatedly
-
1
,2
,3
1500-2500
B position
-
1, 2, 4
600-800 (idling speed)
A<->B
position repeatedly
-
1
,2
,3
idling - max. speed
A position
-
1, 2, 5
]]
,6
]]
600-800 (idling speed)
A->B position
-
1, 2
idling - max. speed
B position
-
1, 2, 5
]]
,6
]]
]
Until a fluid temperature of 75-80 ëC (167-176ëF) has been reached
]]
At different speeds.
When the transmission has been completely as-
sembled and filled up with transmission fluid, it would
be convenient to make a function test.
This test can be carried out on a bench test rig, or in a
boat. If no fluid cooler can be connected, a hydraulic
hose must be connected between the inlet and outlet
of the hydraulic pump.
Measuring instruments required:
.
Pressure gauge 0-40 bar (0-580 psi), with connect-
ing thread M10x1
.
Temperature gauge 0-120ëC (0-250ëF), connect-
ing thread 3/8"-18NPSF
.
Flow meter 0-35 liters/min (0-10 gals/min)
Tests to be carried out:
1. Fluid leaks
2. Noise emission
3. Direction of rotation, LH/RH
4. Lube oil temperature
5. Shifting pressure
6. Lube oil flow rate