TM 5-4310-386-14
4-25. Compressor Drive Belt and Guard (Cont).
b.
Replace.
(1)
Beltguard. (figure 4-30)
(a)
Remove four alien screws (1) and lockwashers (2).
(b)
Remove beltguard (3) from compressor (4).
(c)
Install beltguard (3) and secure with four alien head screws (1) and lockwashers (2).
(2)
Belt. (figure 4-30)
(a)
Remove beltguard (para. (1) above). I'
(b)
Loosen alien screws (5) and (6) and push the middle tension pulley (7) in the direction of arrow
A.
(c)
Remove two alien screws (8) and lockwashers (9) from eccentric shaft drive gear (10).
(d)
Remove eccentric shaft drive gear (10) and belt (11).
CAUTION
The following is mandatory when replacing the tension COG belt for it is part of the timing for the
proper injection point of the oil pump.
(e)
Install eccentric shaft drive gear (10) and secure with two lockwashers (9) and alien screws (8).
(f)
Turn eccentric shaft drive gear (10) in clockwise direction until greatest resistance is felt.
(g)
Have Direct Support personnel remove 4th stage valve head and ensure piston is at top dead
center.
(h)
Have Direct Support personnel install 4th stage valve head.
(i)
Remove two alien screws (8), lockwashers (9), and eccentric shaft drive gear (10).
(j)
Install belt (11) over top tension pulley (12).
(k)
Place eccentric shaft drive gear (10) on belt (11) and secure with two lockwashers (8) and allen
screws (9).
(l)
Pull middle tension pulley (7) outward in direction of arrow B at a force of 5. 166 Ib-ft (7 NM).
(m)
Tighten alien screws (5) and (6).
4-72
