Case CB20 CB40 CB60 CB80 CB140 CB210 CB380 Hydraulic Breaker Service Manual - PDF DOWNLOAD

Page 73

V. Servicing

f) Apply manual torque on through bolt set For CB80 and above, manual torque can also be applied if power torque wrench out of order. 1st step Make Initial Setting of top nuts with 50 kg.m (490 N.m) torque wrench and impact socket. Mark an apex of top nut and also mark back head surface where each apex of top nut indicates. Marking point

NOTE! CB80 CB140 CB210 CB380

Back head

C

A

B

D

Hammer size 10 lb (4.54 kg) 12 lb (5.44 kg) 16 lb (7.26 kg) 20 lb (9.07 kg)

Top nut

NOTE! Apply each step torque in “A  B  C  D” sequence.

Through bolt

2nd, 3rd, 4th step Turn top nut with hammer and impact socket until the marked apex turns by number of turns specified on the 2nd, 3rd, 4th step respectively. See Manual Torque table. Manual torque applying Manual torque Model

72

Torque value (kg.m/N.m/ft.lb)

st

nd

1 step

2

step

Torque value

Turn

Torque value

Turn (from previous step)

CB20

30/294/217

15/147/108

30/294/217

CB40

45/441/326

20/196/145

45/441/326

CB60

50/490/362

20/196/145

50/490/362

CB80

50/490/362

50/490/362

95/931/687

2.5/6

CB140

160/1,568/1258

50/490/362

90/882/651

1/6

CB210

270/2,646/1,953 (310/3,038/2,242)

50/490/362

90/882/651

0.5/6

CB380

390/3,822/2,821 (450/4,410/3,255)

50/490/362

150/1,470/1085

1/6


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Case CB20 CB40 CB60 CB80 CB140 CB210 CB380 Hydraulic Breaker Service Manual - PDF DOWNLOAD by www.heydownloads.com - Issuu