TM 5-3805-280-24-2
Hydraulic System
15. Inspect dust seals (A) and bushing (B) for wear or
damage, replace as necessary. (See Remove and
Install Bushing and Seals in Group 3340.)
Boom Cylinder Head End and Rod End Bushing--Specification
ID ..................................................................... 90.0 mm (3.54 in.) nominal
ID ................................................................ 91.5 mm (3.60 in.) limit of use
Arm Cylinder Head End or Rod End Bushing--Specification
ID ..................................................................... 80.0 mm (3.15 in.) nominal
ID ................................................................ 81.5 mm (3.21 in.) limit of use
Bucket Cylinder Head End Bushing--Specification
ID ..................................................................... 80.0 mm (3.15 in.) nominal
ID ................................................................ 81.5 mm (3.21 in.) limit of use
Bucket Cylinder Rod End Bushing--Specification
ID ..................................................................... 90.0 mm (3.54 in.) nominal
ID ................................................................ 91.5 mm (3.60 in.) limit of use
16. Check for rod curvature.
Put rod on V-blocks. Measure for rod curvature using
a dial indicator.
A--Dust Seal
Boom Rod--Specification
B--Bushing
Curvature .......................................................................... 0.5 mm per 1 m
(0.020 in. per 3.25 ft)
Arm Rod--Specification
Curvature .......................................................................... 0.5 mm per 1 m
(0.020 in. per 3.25 ft)
Bucket Rod--Specification
Curvature .......................................................................... 0.5 mm per 1 m
(0.020 in. per 3.25 ft)
17. Inspect rod surface for scratches or wear.
Boom Rod Allowable Scratch--Specification
Depth .......................................................... 0.1 mm (0.004 in.) (enough to
33
detect by a fingernail)
3360
164
Boom Rod--Specification
OD ......................................................... 90 0.03 mm (3.543 0.001 in.)
Continued on next page
TX,33,UU3813
1922SEP9810/11
21-196
