PREVOST H3-41 Maintenance Manual page 994

SECTION 23A: ACCESSORIES - H3 SERIES
8. Connect the windshield washer tubing at the
base of the wiper arm;
9. Check the adjustment on a wet windshield.
FIGURE 39: UPPER WINDSHIELD WIPER
11.1.2 Removal
1. Remove the cap nuts from;
2. Disconnect the windshield washer tubing at
the base of the wiper arm;
3. Mark the relationship of the arm head to the
end of the knurled drive shaft to ensure the
original position if the arm is to be reinstalled;
4. Lower windshield wiper: loosen the clamping
set screw on the base of the drive arm;
5. Remove the wiper arm assembly.
11.1.3 Installation
1. Make sure the wiper motor is in the stop
position. Lower windshield wiper: position the
wiper arm on the knurled drive shaft and idler
arm on the pivot shaft. Upper windshield wip-
er: position the wiper arm assembly on the
knurled drive shaft;
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PA1621 Maintenance Manual All Series | Jan 2020
2. If the original arm is reinstalled, align the
marks made during removal;
3. Operate the wipers on a wet windshield to
check the wiper blade sweep and angle.
Readjust as necessary;
4. Lower windshield wiper: Tighten clamping nut
onto the drive arm. Install cap nuts onto the
arm shafts;
5. Connect the windshield washer tubing at the
base of the wiper arm;
6. Check the adjustment on a wet windshield.
11.2 LOWER LINKAGE ADJUSTMENT
1. Make sure the wiper motor is in the stop
position prior to working on the linkage.
2. Adjust the two pivot shafts vertically.
3. Adjust the rod length of the connecting pivot
shafts.
maintain the pivot shafts in the vertical
position.
4. Adjust the rod located between right pivot
shaft and motor to a 40.5
The motor lever must be on the same axis
as the rod.
23087
5. Install the right wiper arm in its normal
position (in the middle of the windshield).
Refer to paragraph ''Sweep Adjustment''.
6. The right wiper arm final adjustment is made
by adjusting the smallest rod length.
7. Install the left wiper arm in its normal position
(in the middle of the windshield). Refer to
paragraph ''Sweep Adjustment''.
8. The left wiper arm final adjustment is made
by adjusting the longest rod length.
9. Check the adjustment on a wet windshield.
11.3 UPPER LINKAGE ADJUSTMENT
1. Make sure the wiper motor is in the stop
position prior to working on the linkage.
2. Adjust rods length.
3. Install the left wiper arm in its normal
position (in the middle of the windshield).
Refer to paragraph ''Sweep Adjustment''.
During rod length
angle (Figure 40).
o
adjustment,