Service Note: Adjusting Clutch Air Gap - New Holland T8010 Manual

Steps and Test Point
5. Is 12V present at pin 3 of compressor clutch
relay?
6. A properly functioning relay can be heard
engaging. Toggle the A/C switch OFF and ON,
and listen for a clicking sound. Is the relay
functioning?
7. Is 12V present at terminal 5 on the relay?
8. Keyswitch OFF. Measure resistance between pin
A on CCU2 and pin 1 at the relay. Less than 1
ohm?
9. Keyswitch and A/C switch ON; blower control on
any speed but OFF, temperature control to
maximum cooling. Supply independent ground to
pin A on the 5-pin connector at the controller.
Does compressor clutch engage?

Service Note: Adjusting Clutch Air Gap

When replacing a clutch in the field, pay special
attention to the air gap between the clutch plate and
pulley. Too little gap will increase voltage draw at the
the clutch, resulting in premature failure. Too much
gap will introduce too much foreign material into the
clutch.
A spark plug gauge with 90° wire feelers may be
used to check the gap. Slip the wires between the
clutch plate and the pulley, and check the gap at the
three rivets. The gap must be 0.016 to 0.031 inch
(0.41 to 0.79 mm). The gap must be even all the way
around the plate. If necessary, lightly lift or push
down on the plate to make the gap even.
NOTE: If the gap does not meet the above
specifications, remove the front plate and add or
subtract clutch shims as required.
Reference:
See Air Conditioner System Service Section for
clutch disassembly and adjusting the air gap during
clutch replacement.
Section 50 - Climate Control - Chapter 1
YES - Go to next Step.
NO - Locate and repair open condition between pin 3
on relay and pin F on blower speed switch, through
C139-A.
YES - Relay coil functioning normally. Go to next Step.
NO - Replace the relay.
YES - Go to next Step.
NO - Replace the relay.
YES - Go to next Step.
NO - Locate and repair open condition on wire 1A-Or
between pin A and pin 1.
YES - Test the controller. See Standard Controller
Test, page 65, in this Section.
NO - Locate open condition and repair between pin 5
on relay and C72-A at the clutch, through C139-C,
C10-84 and C333-15.
50-1-72
Corrective Actions
RI03B040