Service Manual

Rev. C
ProForce Debris Blower Page 5 -- 9 Blower Assembly
4. Remove top grill to allow access to blower assembly
(see Guards Removal in the Service and Repairs sec-
tion of Chapter 6 -- Chassis).
5. Remove blower drive shaft from machine ( see Blow-
er Drive Shaft Removal in this section).
6. Remove rotor assembly (see Rotor Assembly Re-
moval in this section).
7. For assembly purposes, use a marker to make a line
across the bearing holder (item 2) and inner housing
(item 8) to show proper alignment.
8. Remove four (4) cap screws that secure bearing
holder to inner housing.
NOTE: On machines with serial numbers below
310000000, bearings are secured with Loctite Product
641 medium strength bearing mount. Heating of the in-
ner housing and bearing holder in the bearing area may
be required during disassembly.
9. Slide rotor shaft and bearing holder assembly from
inner housing.
10.Remove four (4) f lange head screws (item 7) that se-
cure front bearing cap to bearing holder. Remove bear-
ing holder from rotor shaft assembly.
11. Using Figure 6 as a guide, remove bearings, retain-
ing rings and front bearing cap from rotor shaft as neces-
sary.
12.On machines with serial numbers above
310000000, remove and discard O--ring (item 11) from
inner housing.
13.Inspect rotor shaft and bearing bores of bearing
holder and inner housing for wear or damage. Replace
parts as necessary.
Installation (Fig. 6)
1. Install bearings onto rotor shaft:
A. Install inner retaining rings into shaft grooves if
they were removed.
B. Make sure that front bearing cap (item 6) is
placed on rotor shaft between bearing locations.
C. Install bearings onto shaft by pressing on inner
race. Make sure that bearings are seated against in-
ner retaining ring.
D. If equipped, install outer retaining rings.
IMPORTANT: To prevent the bearings from rotating
in the inner housing o r bearing holder on machines
with serial numbers below 310000000, Loctite Prim-
er N (or equivalent) and Lo ctite Product 641 (or
equivalent) must be used during assembly.
2. On machines with serial numbers below 310000000:
A. Clean bearing bores of bearing holder and inner
housing with brake parts cleaner or similar non--oily
cleaner. After cleaner dries completely, apply Loctite
Primer N (or equivalent) to bearing bores. Allow
Primer to dry completely.
B. Thoroughly clean OD of bearings on rotor shaft.
Apply Loctite Product 641 (or equivalent) to OD of
both bearings.
3. Slide bearing holder onto bearing on rotor shaft.
Position front bearing cap (item 6 or 9) to bearing holder
andsecurewithfour(4)flangeheadscrews(item7).
4. On machines with serial numbers above
310000000, install new O--ring (item 11) into inner hous-
ing.
NOTE: Later production bearing holder (item 2) has a
groove that locates onto tab on inner housing (item 8).
If equipped, make sure that these items align during as-
sembly.
5. Install rotor shaft assembly into inner housing. Make
sure to align marker line made during disassembly and
that bearing is fully seated in housing bearing bore. Also,
make sure that bearing holder slides fully into inner
housing.
6. Install four (4) cap screws to secure bearing holder
to inner housing. Tighten screws in three (3) equal steps
and in a crossing pattern. Final torque on screws should
be from 180 to 200 in--lb (21 to 23 N--m). After tighten-
ing screws, make sure that rotor shaft rotates freely.
7. Install rotor assembly (see Rotor Assembly Installa-
tion in this section).
8. Install blower drive shaft (see Blower Drive Shaft
Installation in this section).
9. Install top grill to machine (see Guards Installation in
the Service and Repairs section of Chapter 6 -- Chas-
sis).
10.Install nozzle pulley and nozzle to rear of outer hous-
ing ( see Nozzle Assembly Installation) in this section).
11. Connect negative battery cable to negative battery
terminal. Tighten nut that secures battery cable from 10
to 15 ft--lb (14 to 20 N--m). Make sure that battery cover
is secured.
Blower
Assembly