PS Magazine - TB 43-PS-455
PS, The Preventative Maintenance Monthly
ISSUE 455
OCTOBER 1990
M939/
A
1-Series Trucks .
..
'
ower steering pu
m
p belts live a
short lif on these 5-ton trUcks because
IF you have a truck that's in ±r a
power steering pump belt, check pulley
alignmeNt. Lay a straight edge across
the FAce oF the accessory drive pulley²
³se the 6-in mach´nists rule µom your
tool box²
MEasurE the distanCE bEtween the
±traight EdgE and the top of the pumP
pulley.
TheN mEasure thE DistancE be·
twEEn the ±traight edge aNd thE bot²
tom of the pump pulley³
Replace the pump mounting br¶cket,
NSN
2530·00·¸30-3596 iF the di¹erº
ence between top and bottom me¶sure»
ments ´s more tH¶n
1
/
1
6
inch¼
±2
OCT
90
2´· and 5µ¶On ¸RU¹K± .º»
r±,²³R i´µt f®¶ l@·:'¸¹ º»¼$
cracked rubber bushing doeS noT
mean a torque rod on your M44·, M39-,
M809½or M939·ser´es truck is bad¾
¿est the rod by pl¶cing the À¶t end
Push on the end oF the bar so that
oF a 3-Ft crowb¶r,
nSN
5120·00-242·
the hook end moves 4 to 6 inches² Re·
0762, between the torque rod ¶nd the
le¶se tÁe pressure on tÁe cÂowb¶r²
mounting bracket¾ You can also use
the 36-in p´ncH baÂ,
nSN
5120-00·
224-1372,
caÃed
on
tHe
5·ton
OCt
90
±3
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