ZF Repair Manual: ZF63A, ZF63, ZF80A, ZF80-1A
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The function test should be carried out follows:
Motor speed
rpm
Shift lever
position
Temperature
Durat.
minutes
Test
800-1000
neutral
40ëC/104 ëF
5
1, 2
600-800
(idling speed)
A<->B
position repeatedly
40ëC/104 ëF
-
1, 2, 3
1500-2500
B position
80ëC / 176 ëF
-
1, 2, 4
600-800
(idling speed)
A<->B
position repeatedly
80ëC/176 ëF
-
1, 2, 3
idling - max. speed
A position
80ëC/176 ëF
-
1, 2, 5
]
,6
]
600-800
(idling speed)
A->B
position 80ëC/176 ëF
-
-
1, 2
idling - max. speed
B position
80ëC/176 ëF
-
1, 2, 5
]
,6
]
80ëC/176 ëF
-
Screw ZF 80A, ZF 80-1 A
M6
7
9
242 or 262
]
At different speeds.
30
Repair Manual and Spare Parts List
Section 8: Function test
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) connecting
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. Output direction of rotation, LH/RH
4. Lube oil temperature
5. Shifting pressure
6. Lube oil flow rate