Group SA, Safe Maintenance
SA-2-4 • Lifting, Jacking, and Blocking SM 765, Nov '06
4. Raise the truck only as high as necessary to perform
the maintenance work.
5. Put blocks at both sides of the truck, fully under the
frame main side structure. Put the blocks in front of
but close to the counterweight and steer wheels for
best truck stability.
Put an equal number of blocks under each side of the
truck to provide a level working position.
6. Lower the truck onto the blocks and remove the jack.
CAUTION
!
Before performing any maintenance work,
check the truck for stable condition on the
blocking by determining that it will not rock
on blocks.
7. When maintenance work is completed, lower the rear
of truck to the floor by reversing the above procedure
and lowering each side of the truck 50 mm (2 in.) at a
time:
• Put jack under frame and raise truck.
• Carefully remove blocks and lower truck.
• Remove jack and blocks from drive wheels.
Raising Entire Truck
Refer to truck data plate for truck weights.
1. Park truck safely. Lower upright fully.
2. If necessary, drive truck onto boards to increase
underclearance.
WARNING
!
SIDE-TO-SIDE TIPOVER. When jacking
side of truck, be sure upright is lowered fully.
Do not raise one side of the truck more than
about 50 mm (2 in.) higher than the other, to
avoid tipping truck over laterally.
END-TO-END TIPOVER. If the upright and
drive axle are removed while the truck is
blocked up, the truck will tip backward due
to the heavy counterweight. Upright and
counterweight must both be removed before
attempting to raise the truck for drive axle
removal. The back of the truck must be sup-
ported by blocking under the steer axle to
prevent movement.
If the counterweight is removed while the
truck is up on blocks, the weight of the
upright and drive axle will cause the truck to
fall forward.
3. Put the jack under side frame, near the center of the
truck.
IMP
RTANT
Be sure to put the jack squarely and fully
under the main side structure of the frame.
4. Carefully raise the truck one side at a time, only as
high as necessary to do the maintenance work, and
not more than 150 mm (6 in.) total.
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