User Manual

MAINTENANCE

Item 7 – Tachometer Drive

A typical tachometer drive take-off

location is the camshaft drive gear

access cover on the front of the gear

case cover. Lubricate t he tachometer

drive (if so equipped) every 150 hours

or 15,000 miles (24,000 km) with an

all-purpose grease. At temperatures

above –1° C (+30° F) use a No. 2

grade grease. Use a No. 1 grade

grease below this temperature.

Item 8 – Drive Belts

Belts should be n e ither to o tight nor

too loose. Belts that are too tight

impose extra loads on th e crankshaft,

fan and/or altern a tor bearings,

shortening both belt and bearing life.

Excessively overtightened belts can

result in crankshaft breakage. A loose

belt will slip and may cause damage

to accessory components.

PERSONAL INJURY

To avoid injury from rotating belts

and fans, do not remove and

discard safety guards.

Use a belt tension gage, such as

Kent-Moore® too l J 235 86– B

(V-belt), J 236 00– B (poly-V belt),

J 41251 (Pow erBan d® and 12–rib

poly-V belt), or equivalent, when

tensioning drive belts. Tension b e lts

to the values listed in Table 18.

Fan Drive

Single Belt 2 or 3 Belts

80 – 100 lbs (356 – 445 N) 60 – 80 lbs (267 – 356 N)

Alternator Drive

Belt New Used

Two 1/2–in. V-Groove 125 lbs (556 N) 100 lbs (445 N)

2–Groove PowerBand® 200 lbs (890 N) 150 lbs (667 N)

12–Rib Poly-V (50 DN Alternator) 350 lbs (1,557 N) 250 lbs (1,112 N)

Table 18 Drive Belt Tensioning

72 All information subject to change without notice. (Rev. 01/04)