24
4. Stop the engine and remove the key.
5. Apply oil to newly exposed unlubed chain spans.
Checking the Tension
Check the drive chain tension before using the traction
unit for the first time and every 50 hours of use thereafter.
The drive chains should have about 1–1/2 to 2–1/2 inches
(3.8 to 6.35 cm) of slack between the bottom of the chain
guard and the bottom chain span when the top chain span
is pulled tight. Use the following procedure to check the
tension:
1. With the bucket installed, lower it into the ground until
the front tires are off of the ground.
2. Stop the engine and remove the key.
3. Turn the front wheel forward on one side of the
traction unit until the top span of the drive chain is
tight.
4. Measure the distance between the bottom of the chain
guard and the lower chain span (Fig. 21). If the slack
in the chain is not within 1–1/2 to 2–1/2 inches (3.8 to
6.35 cm), adjust the tension (refer to Adjusting the
Tension).
m–3962
1
2
3
Figure 21
1. Chain guard
2. Bottom span of the chain
3. 1–1/2” to 2–1/2”
5. Repeat steps 3 and 4 for the other drive chain.
6. Start the engine and raise the bucket to return the front
wheels to the ground.
Adjusting the Tension
1. With the bucket installed, lower it into the ground until
the front tires are off of the ground.
2. Stop the engine and remove the key.
3. Loosen the nuts securing the axle retaining bracket
(Fig. 22).
4. Loosen the nut on the chain tensioning bolt and loosen
the bolt (Fig. 22).
m–3963
3
4
2
1
Figure 22
1. Axle retaining bracket
2. Nut
3. Chain tensioning bolt
4. Nut
5. Turn the front wheel on one side of the traction unit
until the upper span of the drive chain is tight.
6. Adjust the chain tensioning bolt until the distance
between the bottom of the chain guard and the lower
chain span is within 1–1/2 to 2–1/2 inches (3.8 to 6.35
cm) (Fig. 21).
7. Position the axle retaining bracket tight against the
axle and the frame, then tighten the nut on the bolt to
secure it in place (Fig. 22) and torque the nut to 30
ft-lbs (40.7 N⋅m).
8. Tighten the nuts securing the axle retaining bracket
and torque them to 75 ft-lbs (102 N⋅m).
9. Repeat steps 3 through 8 for the other drive chain.
10. Start the engine and raise the bucket to return the front
wheels to the ground.
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