TM 3-4230-218-12&P
3-6.
DECONTAMINATING APPARATUS - Continued.
(2) Adjustment.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
Release four fasteners (2) and remove panel (1).
Loosen water pump belt tensioner attaching bolts (6).
Move tensioner (7) as far to left as possible.
Move water pump belt tensioner (7) to the right until
roller (8) just touches belts (5).
Move tensioner (7) an additional 1/4 inch to the right and
securely tighten bolts (6). Replace panel.
Start engine and run unit for approximately 30 minutes.
Shut unit down and carefully reach in and touch fan hub
(3). (This hub is the drive pulley for the water pump.)
If hub surface is warm to touch, belts (5) need to be
tightened.
Tighten belts as follows:
(1) Using any sharp pointed instrument available, scribe
position of left end of tensioner (7) on fan housing
(4).
(2) Slightly loosen two attaching bolts (6), but do not
remove.
(3) Push tensioner (7) 3/16 to 1/4 inch further to the
right and while holding in place, securely tighten
—
ataching bolts (6).
(4) Repeat steps (e) and (f) to verify adjustment.
Reinstall panel (1) and lock four fasteners (2).
Drive Belts, Adjustment.
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