Komatsu PC88MR-10 Shop Manual page 1103

6. Replace fan belt (4).
Installation
(PC88MR-B430-720-K-00-A)
1. Install fan belt (4).
2. Apply the wrench to portion (C) (width across
flats: 12.7 mm) of tensioner assembly (2), and
turn it in the direction opposite to the tightening
direction.
a Make sure that it is securely inserted into part
(C) of tensioner assembly (2) before turning
the wrench. (The spring of tensioner
assembly (2) is strong. If the wrench is
loosely inserted, the wrench may
accidentally come off while being turned, and
it is extremely dangerous.)
3. Remove nut A7, and disconnect holding bracket
A6.
4. Replace collar A5.
a After removing fan belt (4), return tensioner
assembly (2) to its original position slowly
and carefully.
5. Check that the groove of the alternator belt (3)
fits in the each pulley groove (5) without any
displacement.
PC88MR-10
50 Disassembly and assembly
Engine and cooling system
50-75