BOOM RT880E SERVICE MANUAL
4-10 Published 11-10-2014, Control # 524-00
45. Remove the mounting plates from the upper cylinder
barrel mounting lugs.
46. Slide the telescope cylinder assembly out the rear of the
fly until access to the wear pad holders on each side of
the upper telescope cylinder support foot is obtained.
Remove the two bolts and washers securing each
holder and remove the holders.
47. If necessary, remove the two screws securing the wear
pad to each holder and remove the wear pad.
48. Remove the two capscrews and washers securing the
extend cable keeper plate to the rear of the fly. Remove
the keeper plate and remove the five extend cable ends
from the slots in the fly.
49. Continue to slide the telescope cylinder assembly out of
the fly section. Lowering the rear of the fly section and
raising the rod end of the cylinders will aid in removal.
50. Remove the cotter pin and washer securing the retract
cable lug ends to the telescope pin cylinder mount.
51. Remove the two nuts and swivel nuts that attach the sled
weld to the two adjusting bolts at the end of the lower
cylinder.
52. Slide the sled weld off the two adjusting bolts and
remove the adjusting bolts from the shaft on the lower
cylinder.
NOTE: The upper telescope cylinder weighs approxi-
mately 1950 lb (1000 kg) and the lower telescope
cylinder weighs approximately 2160 lb (1357 kg).
53. Remove the shaft from the lower telescope cylinder.
54. Using an adequate lifting device, remove the upper cyl-
inder from the lower cylinder.
55. On the front of the fly section, remove the nut and
washer from the end of each retract cable and remove
the retract cables from the fly section.
56. Remove the capscrews securing the rear bottom wear
pad on the fly section and remove the wear pad.
57. If necessary, remove both grease fittings, connectors,
and grease lines from the rear of the fly section.
58. If necessary, remove the capscrews securing the skid
pad to the cylinder mount and remove the skid pad.
59. Remove the capscrews and washers securing the
extend cable retainer plate to the front of the upper tele-
scope cylinder. Remove the retainer plate.
60. Remove the extend cables from the sheave assembly.
61. Remove the capscrews and flatwashers securing each
plate to the sheave mounting assembly. Remove the
sheave shaft and the sheave assembly from the mount-
ing assembly.
62. Remove the capscrews and washers securing the
sheave mount to the upper telescope cylinder. Remove
the sheave mount.
63. If necessary, remove the two bolts securing each wear
pad to the support foot and remove the wear pads.
64. If removal of the boom nose sheaves are required, refer
to Boom Nose Sheaves - Removal in this section.
65. Refer to Boom Extension and Retraction Cable, page 4-
16 for cable inspection.
Boom Nose Sheaves
Removal
1. Remove the hitch pin clip from the hitch pin and remove
the pin from the upper and lower part of the boom nose.
2. Remove the capscrew, and nut securing the upper boom
nose sheave shaft. Remove the lock collar and shim.
3. Carefully pull the upper boom nose sheave shaft from
the boom nose, removing the spacers, shims, and boom
nose sheaves. Note location of each.
4. Repeat steps 2 and 3 and remove the lower boom nose
sheave shaft.
5. Remove the shim, washers, and locknut from both
sheave shafts.
108 Sheave Mount
109 Boom Pivot
110 Pin
111 Clip Pin
112 Cable Wear Pad
113 Trunnion Mounting Plate
114 Capscrew
115 Washer
DANGER
Ensure the telescope cylinders are securely blocked and
some means used to hold them together to prevent any
accidental movement. Severe injury can occur if the
cylinders drop.
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