Detroit Diesel 60 Series Operator's Manual page 42

If a belt tension gage is not available,
adjust the belt tension so that a firm
push with the thumb, at a point midway
between the two pulleys, will depress
the belt 12.70-19.05 mm (.500"-.750").
®
2-Groove PowerBand
new belt to 200 lbs, then run the engine
for 10 minutes at 1200 rpm. Stop the
engine and allow a 10-15 minute cool
down period. Check tension. If less than
150 lbs, retension to 150 lbs. Following
initial tensioning, measure belt tension
every month or every 7,500 miles
(12,000 km), whichever comes first.
Retension belt to 150 lbs at these inter-
vals.
12-Rib Poly-V Belt—Tighten a new
belt to 350 lbs then run the engine at
high idle for 30 minutes. Stop the engine
and allow a 10-15 minute cool down
period. Check tension with tool J
41251-B or equivalent. If 250 lbs or
more, no retensioning is required. If less
than 250 lbs, retension to 250 lbs.
Measure belt tension every month or
every 7,500 miles (12,000 km), whichev-
er comes first. Retension to 250 lbs as
required.
Drive belts (V and Poly-V) should
be replaced every 2,000 hours or
100,000 miles (160,000 km).
Replace ALL belts in a set when
one is worn. Single belts of similar size
should not be used as a substitute for a
matched belt set. Premature belt wear
can result because of belt length varia-
tion. All belts in a matched belt set are
within .032" of their specified center
distances.
When installing or adjusting an
accessory drive belt, be sure the
bolt at the accessory adjusting pivot
point is properly tightened, as well
as the bolt in the adjusting slot. In
addition, check the torque on the
alternator and bracket mounting
bolts and retighten, as required.
Item 9 — Air Compressor
All air compressor air intake parts should
be removed and cleaned at these inter-
—Tighten a
vals:
• On-highway vehicle engines —
7,500 miles (12,000 km)
• Industrial engines — 150 hours or
4,500 miles (7,200 km)
To clean either the hair- or polyure-
thane-type compressor air strainer ele-
ment, saturate and squeeze it in fuel oil,
or any other cleaning agent that would
not be detrimental to the element, until it
is dirt-free. Then, dip the element in lubri-
cating oil and squeeze it dry before plac-
ing it back in the air strainer.
For replacement of the air strainer ele-
ment, contact the nearest servicing
dealer; replace with the polyurethane
element, if available.
Every 12 months or 30,000 miles or
48,000 km (300 hours for industrial
applications) the air compressor mount-
ing bolts should be tightened.
Item 10 — Air Cleaner
The air cleaner element should be
inspected every 15,000 miles (24,000
km) for vehicle engines, 150 hours for
non-vehicle engines, or more often if the
engine is operated under severe dust
conditions. Replace the element if nec-
essary. Check the gaskets for deteriora-
tion and replace, if necessary. If the dry
type air cleaner is equipped with an aspi-
rator, check for aspirator damage or
clogging. Clean and repair as necessary.
Under no engine operating conditions
should the air inlet restriction exceed 20
inches of water (5.0 kPa). A clogged air
cleaner element will cause excessive
intake restriction and a reduced air sup-
ply to the engine. This, in turn, can result
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