Manitowoc GHC75 Maintenance Instructions Manual page 6

Table of contents
6
6 Uppercarriage.................................................................... 57
6.1 Check pressure accumulator...................................... 57
6.2 Servicing battery connections..................................... 58
6.3 Slewing gear............................................................... 59
6.3.1 Safety instructions................................................... 59
6.3.2 Check the slewing gear oil level.............................. 59
6.3.3 Change slewing gear gear oil.................................. 61
6.4 Check the slewing gear fastening bolts...................... 62
6.5 Check ballast elements - ballast rods......................... 63
7 undercarriage.................................................................... 64
7.1 Cleaning the frame and track frames.......................... 64
7.2 Maintain the crawler track........................................... 64
7.3 Spring tensioning fixture - adjusting the chain ten-
sion............................................................................. 66
7.4 Checking the tightening torque of base plate bolts..... 67
7.5 Checking the travel drive oil level............................... 68
7.6 Changing the travel drive oil....................................... 69
7.7 Check crawler chain tension....................................... 70
7.8 Slewing ring................................................................ 71
7.8.1 Visual check of the slewing ring connection............ 71
7.8.2 Lubricate slewing ring gearing................................. 71
7.8.3 Check the slewing ring fastening nuts..................... 71
7.8.4 Tighten slewing ring bolts........................................ 72
7.8.5 Measure slewing ring backlash................................ 73
7.9 Rotary connection....................................................... 75
7.9.1 Lubricating the slewing ring raceway manually....... 75
7.9.2 Slewing ring lubrication............................................ 76
8 Load hoist mechanism..................................................... 79
8.1 check the pressure roller on the winch....................... 79
8.2 Check the limit switch on the winch............................ 79
8.3 Check securing of the winch load foot........................ 80
8.4 Change winch gear oil................................................ 81
8.5 Lubricate winch bearings............................................ 83
8.6 Check the splined shaft connection on the winch....... 84
9 Rope................................................................................... 86
9.1 Completely unroll and roll up the rope........................ 86
9.2 Lubricate rope............................................................. 88
10 Hydraulic system.............................................................. 90
10.1 Hydraulic hose lines.................................................. 90
10.2 Bleed hydraulic pumps............................................. 90
10.3 Depressurizing the hydraulic system........................ 91
10.4 Change hydraulic leakage oil filter............................ 91
10.5 Change the hydraulic oil return filter......................... 93
10.6 Change hydraulic hoses........................................... 94
Preliminary
GHC75 Telescopic crane
Crane Care
21.12.2017