Fan Removal / Installation; Fan Right Angle Gearbox; Maintenance; Oil Change - PREVOST H3-41 Maintenance Manual

 Check drive belt for fraying, cracking, and
proper tension.
 Turn fan through at least 360° of rotation. It
should turn smoothly with no resistance.
14.4

FAN REMOVAL / INSTALLATION

The fan is bolted to the right angle gearbox shaft
flange. To remove the fan:

Unscrew and remove the mounting bolts
and washers.
To reinstall the fan:

If the fan is still in the radiator fan shroud,
place 2 of the mounting bolts on the
opposite side of the flange, in reverse
direction, in order to use them as guide pins
to position the fan.

Once properly positioned, screw the 4
remaining bolts back in (finger tight).

Finally, take the 2 bolts that were used as
guide pins and screw them back in on the
proper side of the fan. Tighten in a star
pattern.
TORQUE: 32 lb-ft (43 Nm)
FIGURE 41: RADIATOR FAN MOUNTING BOLTS
15

FAN RIGHT ANGLE GEARBOX

The radiator fan is belt driven from the engine
crankshaft pulley through a drive belt, a
universal joint shaft, a clutch and right angle
gearbox assembly.
SECTION 05A: H3 SERIES COOLING SYSTEM
15.1

MAINTENANCE

Change the right angle gearbox oil only at
operating temperature at the intervals specified
by the Lubrication And Servicing Schedule in
Section 24: LUBRICATION & SERVICING.
Replace sealing rings at every oil change.
15.2

OIL CHANGE

For the list of approved oils for Linnig right angle
gearbox, refer to Linnig bulletin 142.377 found
on your Technical Publications USB flash drive.
1. Stop engine and make sure that all engine
safety precautions have been observed.
2. Set the ignition to the OFF position and
remove the key from the contact switch to
prevent accidental starting of the engine or
set the rear start panel selector switch to the
OFF position.
3. Clean gear case carefully.
4. Remove the drain plug located underneath
the right angle gearbox case and allow the oil
to drain into a suitable container.
5. Replace the seal and screw the drain plug
back in.
6. Unscrew and remove the oil level plug and
the top filler plug/vent.
7. Add gear lubricant until oil level reaches the
bottom of the side oil level check point
(approximately 0.85 pint).
05125
FIGURE 42: RIGHT ANGLE GEARBOX
PA1621 Maintenance Manual All Series | January 2017
MAINTENANCE
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