SkyTrak 6036 Service Manual - Manual (Page 28)

Section 3. Boom
3-10 Model 6036 S/N 9B0499 and Before
3.1.5 Chain Lubrication
250 Hour Intervals
1. Remove the rear boom cover from the outer
boom.
2. Extend and retract the boom several times
applying multi-purpose lithium based grease to
the entire retract chain with a brush or grease
gun.
3. With the boom fully extended, apply multi-
purpose lithium based grease to the extend
chain using a brush or grease gun.
4. Install the rear boom cover on the outer boom.
Fig. 3.13 Yoke and Extend Chains
Adjust the chains so that:
• the inner boom extends 1-1/2 to 2-1/2" (38
to 64 mm) from the front of the intermedi-
ate boom when the boom is retracted, Fig.
3.11, and
• the extend chains are no closer to the
intermediate boom than 3/4" (19 mm) when
the boom is extended, Fig. 3.12, and
• the front face of the yoke, Fig. 3.13, is
parallel to the front face of the outer boom.
Fig. 3.12 Maximum Extend Chain Sag
3.1.6 Chain Tension Check
250 Hour Intervals
Check tension of boom extend chains after the first
50 hours of operation and at 250 hour intervals
thereafter.
Fig. 3.14 Rear Boom Cover Opening
MAXIMUM CHAIN
SAG WITH BOOM
EXTENDED
IS 3/4" (19 mm)
CENTER SECTION
OF INTERMEDIATE
BOOM
BOOM
EXTEND
CHAINS
EXTEND
CHAIN
SHEAVE
LUBE
FITTING
WEAR
PADS WEAR
PADS
EXTEND CHAIN
LOCKNUTS
FRONT FACE
OF YOKE
MUST BE
PARALLEL
TO FRONT
FACE OF
OUTER
BOOM
OA0491
OA0531
OA0521
RETRACT CHAIN SHEAVE
LUBE FITTING