Replacing the Drive Belt - 4-Cylinder Engines

LX1053313-UN-09APR13

LX1053388-UN-28FEB12

LX1053389-UN-28FEB12

A - Bore

B - Metal pin

C - Tensioner roller

D - Corrugated-head screws (6 pieces)

E - Drive belt

F - Fan

NOTE: On tractors with front PTO, the drive belt must be replaced by your John Deere™ dealer.

Pull the catch and lift the hood up.

CAUTION: Disconnect ground cable (—) from battery.

Use a square-section key to turn the tensioning roller (C) (see arrow) until holes (A) in the base plate and cam are in alignment. Insert a 5 mm (0.2 in.) dia. metal pin (B) into the two bores that are in alignment and secure the tensioning roller.

Take the six screws (D) out of the fan.

Take drive belt (E) off over fan (F).

Install the drive belt according to belt routing and slacken drive belt tensioner again.

For tensioning, turn tensioner roll slightly to release metal pin and pull it from the holes. The drive belt tensioner returns to its tensioning position automatically.

IMPORTANT: When installing, always use new corrugated-head screws.

Put on fan (F) and tighten the new corrugated-head screws (D) to the following specification.

Item	Measurement	Specification
Attachment to fan	torque	22 – 28 Nm 16 – 21 lb.-ft.

Routing of drive belt

LX1053435-UN-29MAR12

A - Compressor (air conditioning system)

C - Alternator

D - Belt tensioner

E - Coolant pump

F - Crankshaft

G - Fan pulley

H - Deflector roll