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Groundsmaster 5910 Operator CabPage 9 -- 5
CAUTION
The air conditioning system is under high pres-
sure. Do not loosen any system fitting or compo-
nent until after the system has been completely
discharged by a certified A/C service technician.
7. Have refrigerant evacuated from air conditioning
system by a certified A/C service technician.
8. Label and remove hoses from compressor. Immedi-
atelycaphosesandfittingstopreventmoistureandcon-
taminants from entering the system.
9. Support compressor to prevent it from shifting or fal-
ling.
NOTE: There may be shims mounted between com-
pressor and pivot plate. When removing compressor,
note shim location and quantity for assembly purposes.
10.Remove carriage screw and flange nut that secure
compressor to tensioner arm. Remove cap screw and
lock nut that secure compressor to pivot plate.
IMPORTANT: To prevent compressor oil from filling
the compressor cylinders, keep compressor in the
same orientation as the installed position.
11.Carefully remove compressor from engine and ma-
chine.
12.If necessary,removecompressormountingbrackets
from engine.
NOTE: Thereplacement of the drier--receiver is recom-
mended whenever A/C compressor is removed from the
system (see Heater and Evaporator Assembly in this
section).
Installation (Fig. 1)
1. If removed, secure compressor mounting brackets
to engine.
2. Positioncompressortopivotplateand tensioner arm
on engine.
3. The clearance between the compressor mounting
flanges and pivot plate must be less than 0.004” (0.10
mm). If necessary, install shims between compressor
flanges and pivot plate to adjust clearance. See Parts
Catalog for shim kit.
4. Secure compressor to pivot plate and tensioner arm
with removed fasteners and nuts. Do not fully tighten
fasteners.
IMPORTANT: After t he compressor has been
installed, make sure to rotate the compressor drive
shaft several times to properly distribute oil in the
compressor. Compressor damage due to oil slug-
ging can occur if this procedure is not performed.
5. Manually rotate the compressor drive shaft at least
ten (10) revolutions to make sure that no compressor oil
is in the compressor cylinders.
6. Place drive belt onto compressor pulley.
7. Tension compressor drive belt:
A. Insert torque wrench in square hole on compres-
sor mount plate (Fig. 2).
B. Rotate compressor with torque wrench from 27
to 33 ft --lb (37 to 44 N--m).
C. Hold compressor in position and tighten fasten-
ers to secure compressor in place. Torque flange
nuts that secure tensioner arm from 27 to 33 ft--lb
(37to44N--m).
8. Remove caps that were placed on hoses and fittings
during the removal process. Using labels placed during
removal, properly secure hoses to compressor.
9. Connect compressor electrical connector to ma-
chine wire harness.
10.Have a certified air conditioning service technician
evacuate the air conditioning system completely, prop-
erly recharge the system with R134a refrigerant and
then leak test the system. A/C system capacity is 1.25
pounds of R134a refrigerant.
11.Lower and secure hood.
1. Compressor
2. Cap screw & lock nut
3. Carriage screw & nut
4. Tensioner arm
Figure 2
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2
3
4
5
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Operator
Cab