NOTE
When installing the belts DO NOT
wrap belt around the tensioner until af-
ter the belt has been wrapped around
all other pulleys and idlers.
2. After installing the belt, carefully
allow the belt tensioner to spring
back to its normal position. If the
tensioner had been temporarily
blocked, relieve tensioner pressure
enough to remove the locking pin,
then allow the tensioner to spring
back to its normal position.
NOTE
DO NOT reuse nylon patch lock nuts.
Replace with new lock nuts when rein-
stalling parts.
3. Reinstall fan blade using NEW
5/16-18 UNC-2A on Horton fans, or
3/8-24UNF-2A on BorgWarner
fans, with nylon patch lock nuts.
4. Reconnect the electrical ground
wire to the battery.
Poly V-belt, Alternator, Air-
Conditioning Compressor Drive
and Coolant Pump Drive Removal
Follow the steps below to remove the poly
V-belt, alternator, air-conditioning
compressor drive and coolant pump drive
belts:
1. Remove the poly V-belt from the
fan and coolant pump drive as
described in "Poly V-belt and Fan
Drive Belt Removal."
NOTE
Removing the fan blade is not neces-
sary if only the accessory belt is re-
moved. After removing the fan drive
belt from its pulleys the accessory belt
can be removed over the fan blade.
2. Next, place a flex-bar with a 15 mm
socket on the alternator and air
conditioning compressor drive belt
tensioner roller fastener as shown.
Move the bar in the direction
shown to relieve pressure on the
belt tensioner.
Flex Bar on Tensioner - Compressor and Coolant
Pump Belt
3. With the belt tensioner pressure
relieved, remove the poly V-belt
from the pulleys.
• The tensioner can be
temporarily blocked with a
0.16-0.2 inch (4-5 mm) thick pin
(bore). This facilitates removal
and installation of the poly V-
belt.
4. After removing the belt, carefully
allow the belt tensioner to spring
ENGINE MAINTENANCE - Maintenance Procedures
90 Y53-1166-1M1 (10/2020)
2
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