Disassembly And Reassembly Of The Arm And Wheel Guard - Hitachi CM 75EAP Service Manual

15. Disassembly and reassembly of the arm and wheel guard

[Tools required]
• Socket wrench (13 mm)
• Hex. bar wrench (4 mm)
• Long-nose pliers
(1) Disassembly
• Loosen the Flange Nut M8 [20] by using a socket wrench (13 mm), and then remove the Arm [63] and
Arm Cover [34] from Crank Case (B) [44].
• Insert a hex. bar wrench (4 mm) into Pulley (B) [51] to lock its rotation. Loosen the Bolt M8 [48] by
using a socket wrench (13 mm). Remove the Flange Washer [87] and outside Wheel Washer [85].
Pull out the Spindle Collar [86] with long-nose pliers and remove the inside Wheel Washer [85].
• Insert a hex. bar wrench (4 mm) into Pulley (B) [51] to lock its rotation. Loosen the Bolt M8 [48] by
using a socket wrench (13 mm). Remove the Washer 8.1 x 30 [49] and Pulley (B) [51]. Loosen the
three Bolts M5 (S) [56] by using a hex. bar wrench (4 mm) and remove the Wheel Guard [80] from the
Arm [63].
(2) Reassembly
Reassembly can be conducted by reversing the disassembly procedure. However, special attention
should be given to the following items.
• Press-fit the Spindle Collar [86] to the Spindle [84] until it contacts the end surface. Be careful not to
bend the Spindle Collar [86]. Orient the Spindle Collar [86] so that its smaller diameter side faces the
Arm [63].
• When inserting Pulley (B) [51] and the Wheel Washer [85] into the Spindle [84], align the width across
flats of Pulley (B) [51] and Wheel Washer [85] with those of the Spindle [84].
• When tightening the two Bolts M8 [48], insert a hex. bar wrench (4 mm) into the holes of Pulley (B)
[51] and the Arm [63] to prevent from rotating.
• Run the Water Supply Hose [76] between the Arm [63] and Wheel Guard [80]. Do not bend the hose.
• Apply 0.15 to 0.25 g of Chemiseal L-391 to the Bolt M8 [48] (pulley side) after degreasing the thread
portion with part cleaner.
• Arm and wheel guard
[20]
*Apply Chemiseal L-391.
[68]
[76]
[48]
[34]
[49]
[40]
[51]
[56]
[57]
[84]
Run the Water Supply Hose [76]
among the four Bolts M5 x 12 [68]
as shown in the figure.
Insert a hex. bar wrench (4 mm) into the holes of Pulley
(B) [51] and the Arm [63] to prevent rotation.
[44]
[63]
[59]
-23-
Hex. bar
wrench
(4 mm)
[51]
[63]
[80]
[83]
[85]
[87]
[86]
[48]