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Maintenance
19
F232183
The grease must have adequate base oil viscosity
with one of the following ratings:
● ISO VG 150 (135–165 cSt at 40°C or
709–871 SUS at 100°F)
● ISO VG 220 (198–242 cSt at 40°C or
1047–1283 SUS at 100°F)
● An SAE 40 rating is also acceptable as long
as the cSt or SUS values are within the
specified ranges.
Pump the grease gun slowly, permitting only
two strokes.
2. Clean the AC drive cooling fins:
a. Remove the AC drive box cover.
b. Blow the fins clean using compressed air at a
pressure of 60 – 90 psi or canned compressed
air. Use care to avoid damaging cooling fan or
other components.
NOTE: No amount of visible foreign matter should
be allowed to accumulate on the fins or the finger
guard.
3. Use the following procedures to determine if
belts require replacement or adjustment. Call a
qualified service technician in either case.
a. Check belts for uneven wear and frayed
edges.
b. After disconnecting power to the washer-
extractor and removing all panels necessary
for access to the drive belt, use one of the
following methods to verify that belts are
properly tensioned:
● Tension Gauge. Belt tension
measurements should be taken as close to
the center of the belt span as possible.
Measurements can be performed with the
Belt Tension Checker. Make adjustments
for the motor pulley diameter and belt type
on the machine.
If belt tension adjustment is required,
loosen motor mounting bolts and slide
motor along motor plate to change the belt
tension. Retighten motor mounting bolts
before verifying belt tension.
● Deflection. Refer to Figure 4. Loosen
motor mounting bolts and slide motor
along motor plate to change belt span
length. Belt tension measurements should
be taken as close to the center of the belt
span as possible. For every inch of belt
span length, the belt should deflect 1/64 of
an inch, or 0.40 millimeter, with an exerted
force of 5.25 pounds for a new belt or
3.5 pounds for a used belt. A belt with a
span length of 20 inches should deflect
20/64 of an inch, or 7.8 millimeters. The
belt(s) should be as loose as possible
without allowing slippage during peak load
condition. An initial (run-in) force of 7 lbs.
should be used to set the belt tension. An
operating (normal) force of 5 lbs. should be
used after the washer-extractor has been
operated for a few hours.
Figure 4
PHM189N
1 Deflection
2 Span Length
1
2