Drive Belt; Belt Tension; Belt Tension Spring Replacement; Shaft Seal Replacement - Ingersoll-Rand XF 20 Operator's Instruction Manual

5.6 DRIVE BELT

Ensure that the compressor is isolated from the
compressed air system by closing the isolation
valve and venting pressure from the drip leg.
Ensure that the main power disconnect switch is
locked open and tagged.
Belt tension is maintained using airend mass and drive
torque about a pivoting airend support in conjunction
with a gas spring. Belt is automatically held under the
correct tension and requires no periodic adjustment.
Replacement Parts
Belts (See Parts Manual APDD 742). Be sure to use
only Ingersoll-Rand Genuine parts to assure proper
belt size and length. Incorrectly sized belts can lead to
overloading of bearings and eventual airend or motor
failure.
Disassembly
1. Remove the belt/fan safety panel from the cooler
box.
2. Disconnect aftercooler inlet tube and discharge
hose.
3. Remove screws which fasten the left hand side of
the cooler; swing cooler outward.
4. Remove spring tension on drive belt by rotating
overcenter toggle clockwise with a 1/2 in. drive ratchet
(See Figure 5.6-1).
FIGURE 5.6-1 DRIVE BELT ASSEMBLY
5. Remove belt.
6. If belt tension spring replacement is required, see
Section 5.8.
Installation / Inspection
Inspect sheave grooves for foreign material or rubber
build-up. Clean and degrease sheaves before
installing drive belts to insure long belt life.
1. Install new belt on motor and airend sheaves. Do
not pry or force the belt over the sheave grooves.
2. Re-apply spring tension by slowly rotating over-
center toggle counter clockwise until it hits the stop.
3. Replace cooler, piping and safety panel.

5.7 BELT TENSION

This unit has been designed with a unique self ten-
sioning system for the drive belts. There is no adjust-
ment required to insure proper belt tensioning. Be sure
to use only Ingersoll-Rand Genuine parts to assure
correct belt tension.

5.8 BELT TENSION SPRING REPLACEMENT

1. With the spring tension relieved as described in step
4 of drive belt disassembly (Section 5.6), remove ten-
sioning spring by lifting clips at each end of the spring
with a flat blade screw driver.
2. Pull spring from ball studs.
3. Install new spring by snapping into place with the
rod end (smaller diameter) toward the larger motor
sheave.

5.9 SHAFT SEAL REPLACEMENT

There are two lip type seals on the compressor. They
are wearable parts and should be replaced at 8,000
hour intervals. While it is advisable to have your local
Ingersoll-Rand Distributor or Air Center perform this
work, the task can be accomplished by a good
mechanic following these instructions.
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