OMHXE29978

Variable Speed Fan Drive Belt—Replacing (Interim Tier 4/Stage III B)

CAUTION:

H95348
H95348-UN-15FEB10

A - Latches

B - Rotary Screen Door

Shut OFF engine, set parking brake and remove key.

Pull latches (A) and open rotary screen door (B).

H95647
H95647-UN-10MAR10

A - Nuts (7 Used)

B - Clamps

C - Air Duct

Remove nuts (A) and loosen hose clamps (B).

Lay air duct (C) out of the way.

H95648
H95648-UN-10MAR10

A - Shield

Remove shield (A).

H95649
H95649-UN-10MAR10

A - Cap Screws (6 Used)

B - Fan Assembly

Remove cap screws (A) from fan assembly (B).

Lay fan assembly out of the way.

H95650
H95650-UN-10MAR10

A - Cap Screws

B - Spacers

Remove cap screws (A) and spacers (B).

Install previously removed cap screws until spring is compressed completely.

H95646
H95646-UN-10MAR10

A - Latch

B - Separator Access Cover

Turn latch (A) to open separator access cover (B).

H95651
H95651-UN-10MAR10

A - Cap Screws (7 Used)

B - Shield

Remove cap screws (A) and shield (B).

H95652
H95652-UN-10MAR10

A - Bleed Screw

Locate valve on front side of support rail and loosen bleed screw (A) to relieve pressure from sheaves.

H95653
H95653-UN-31MAR10

A - Sheave

B - Variable Speed Belt

With bleed screw loose, pull sheave (A) towards engine until completely open.

Remove variable speed belt (B).

NOTE: Belt MUST be installed over driver sheave first and then over driven sheave.

Install replacement variable speed belt.

IMPORTANT:

H95650
H95650-UN-10MAR10

A - Cap Screws

B - Spacers

Spring MUST be un-compressed to allow variable speed fan to adjust speed.

With variable speed belt installed, remove cap screws (A) to un-compress spring and install previously removed spacers (B) as shown.

H95654
H95654-UN-10MAR10

A - Fan Assembly

B - Index Marks

C - Boss

D - Cap Screws (6 Used)

Install fan assembly (A) so index marks (B) are positioned on either side of boss (C).

Install previously removed cap screws (D). Tighten cap screws to specification.

Item Measurement Specification
Cap Screws Torque 40 N·m (30 lb.-ft.)

H95652
H95652-UN-10MAR10

A - Bleed Screw

Locate valve on front side of support rail and tighten bleed screw (A).

Install previously removed shield (front side) and close separator access cover.

Install previously removed shield (rear side) and air duct.

Close and latch rotary screen door.

OUO6075,00006D9-19-20100331