Case 580SR Service Manual page 816

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Remove the washers (5), the nut (6), the screw (2)
and the block (8). Remove the screw (1), the wash-
ers (3) and the belt tensioner (4). Remove the screw
(10), the washers (2) and the compressor (12).
Installation
Installation is the reversal of the removal but the fol-
lowing points should be noted.
Z Torque the fixing bolts to 40-51 Nm.
NOTE: it is recommended that a new receiver/drier
assembly is installed after any system component
replacement or any repair that requires entry into
the system.
Z Drain the oil from the new compressor to be fitted
into a clean container, or if the old compressor is to
be refitted, obtain a new can of refrigerant oil.
Z Calculate the amount of oil to be installed and refill
the compressor.
Z Reconnect the hoses to the compressor and tight-
en all bolts and hoses.
After charging a system use the following start up
procedure to ensure the lubricating oil is properly
dispersed around the system:
Z Ensure air conditioning is switched OFF.
Z Start the engine and bring speed down to idle.
Z Turn the air conditioning ON and allow system to
operate for at least five minutes before increasing
engine speed.
A correctly tensioned belt can be deflected 13-19
mm when hand pressure is applied midway be-
tween the alternator and crankshaft pulley.
Once adjusted re-torque the tension arm bolt to 33.9
Nm.
SECTION 50 - CAB HEATING AND AIR CONDITIONING
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