BOOM MAINTENANCE NBT40 SERVICE MANUAL
4-30 Published 8-01-2017 Control # 287-11
37. Install adjusting bolt (70) and jam nut (111) on lower front
side of 1st stage boom. Install wear pad retaining
hardware (61,62,63) in wear pad pocket.
38. Install upper wear pad assembly (178,179,180) with
hardware (176,177) at upper tip of 1st stage boom.
NOTE: It may be necessary to support the components
with a bar/tool that extends inside the boom section
to aid positioning components during assembly.
NOTE: Apply multipurpose grease (MPG) to all wear pads
and contact surfaces.
39. Install top steel spacer pad (16) with shims (136) with
hardware (23,21,56) at the tip of the 1st stage boom,
Loctite capscrews. Shim according to calibration
instructions in this section.
40. Push 2nd/3rd/4th/5th stage booms keeping 3/2/1 retract
cables taunt completely into 1st stage boom or until top
wear pad aligns with the top access hole in 1st stage
boom.
41. Rotate cam (200) until gap is eliminated between wear
pads and boom section keeping sections centered for
proper boom alignment and tighten clamping hardware.
42. Attach 1st stage cylinder rod to 1st stage hoist mount
with washer (8) and shoulder bolt (11) that has been
torqued and Loctite applied.
43. It is important in this step to have the nuts loose on the 3/
2/1 retract cables (19) at the bottom tip of the 1st stage
boom. Install the 1/2/3 sync extend cables (10) into the
holes at the base of the 1st stage boom, install washer
(8) and double nut (9) just beyond flats.
NOTE: Do not twist cables. Twisting of cables will result in
damage or failure of cable. When initially
assembling threaded ends of cables, thread the
first nut on past the flat so adjustment can be made
later.
44. Torque cables per the “Five Section Cable Tensioning”
procedure.
45. Install all protective caps on threaded cable ends.
46. Install cable guide (76) with washer (56 and nut (133) to
mounting studs at center top of 1st stage boom (1).
47. Extend boom and align all boom sections according to
boom alignment procedure.
48. Install access cover (160) with hardware (161,162) to
top rear of 1st stage boom.
49. Install roller (202) and pin (201) with retaining ring (203)
on lower front tip of 1st stage boom (if equipped).
50. Install boom angle pendulum (158) and bearing (157) to
left side of 1st stage boom.
Reference Only
To Next Page
Loading...
Need help?
General
