SkyTrak 8042 Operation Manual - Manual (Page 154)

152 Model 8042 Rev. 11/03
General Maintenance
A. Boom Chain
Tension Check
Check the boom
chain tension by
measuring the top
boom extend chain sag.
NOTE: The attachment should remain attached to the quick attach for these
checks.
1. Park the vehicle on level ground. Place the travel select lever in (N)
NEUTRAL, move neutral lock lever to NEUTRAL LOCK position,
engage the parking brake switch and raise the boom to a horizontal
(level) position.
2. Fully extend the boom, then retract it 2" (51 mm) (one inch per sec-
tion). Turn the vehicle OFF.
3. Measure the sag (1) in the top boom extend chains (2) between the
bottom of the chains and the top of the intermediate boom (3) at
their closest point. Acceptable boom chain sag is between 1.5"
(38 mm) and 2.5" (64 mm). If the measurement is less than 1.5"
(38 mm) or more than 2.5" (64 mm), the boom chains need to be
adjusted. Refer to the “Top Boom Chain Tension Adjustment” to
adjust the chains.
15. Boom Chains and Wear Pads
OH2390
50
OH2670
1000
OH2690
OA0491
1
2
3