Case 580SR, Service Manual

Page: 59 / 1068

SECTION 17 - TORQUE CONVERTERS 5
1.5 DISASSEMBLY AND ASSEMBLY
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Secure the drive plate (3) to the torque converter (5),
with the attaching bolts and flat washers (1).
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Tighten bolts to 53 Nm.
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Prior to fitting the transmission place the torque
converter carefully over the transmission shaft and
into the transmission housing.
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With the transmission bolted to the engine secure
the drive plate to the flywheel (6) accessed through
the starter motor aperture, with the attaching bolts
and washers (2). Tighten bolts to 41 Nm.
1.6 STALL TEST
The purpose of this test is to determine if the torque
converter and hydraulic clutch assemblies are oper-
ating satisfactorily.
For the test to be conclusive, the transmission hy-
draulic pump and pressure regulating valve must be
operating correctly.
They can be checked by performing the “Line Pres-
sure Test”.
The engine and brakes must also be in good working
order.
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Check the coolant level in the radiator and the oil level
in the transmission. If low, add fluid as required to
bring to the proper level.
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With the gearshift lever and the shuttle lever in neu-
tral, start the engine and run at 800-1000 rpm until
the transmission temperature reaches 29 °C - 35
°C.
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Lock the brakes and shift into fourth gear, increase
engine speed to approximately 900 rpm, then shift
the power reversing lever to the forward position.
This will position the control valve so as to direct
high pressure oil to the front clutch.
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Ensure the brakes are firmly locked so the unit will
not move, gradually depress the foot accelerator
and note the maximum engine speed obtained.
Move the power reversing lever to the neutral posi-
tion. The stall speed should be:
Engine 97 HP............................... 1750 ÷ 1850 rpm
Engine 110 HP............................. 1990 ÷ 2140 rpm
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