SkyTrak 6042 Operation Manual - Manual (Page 161)

General Maintenance
159 Model 6042 Origin 5/02
Inspection Guidelines
1. Park the vehicle on level ground. Place the travel select lever in (N)
NEUTRAL, place the neutral lock lever in the (N) NEUTRAL LOCK
position, engage the parking brake switch and raise the boom to a
horizontal (level) position.
2. Fully extend the boom until the extend chain is taut. Shut the
engine off.
The extend chains will be visible for inspection with the vehicle in
this state. The retract chain can be visually inspected, at the rear of
the boom, as the boom is slowly retracted.
While doing the chain inspection, check all chain clevis ends for
distortion or cracking and sheaves for bearing wear or grooving
from the chain.
3. Inspect the retract chains every 1000 hours of operation. Refer to
the Service Manual for proper procedure.
4. Inspect the chains for the following conditions:
Edge Wear
Check the chain for wear on the link plate edges caused by running
back and forth over the sheave. The maximum reduction of material
should not exceed 5%. This can be compared to a normal link plate
height by measuring a portion of chain that does not run over the
sheave.
The new chain link measures .713" (18 mm) (Figure 107, 1). If the
measurement of the worn chain is less than .677" (17 mm) (2), the
chain should be replaced.
Figure 107
MM2051
1 2