C120R Operator Service Maintenance Manual
800.392.2686
61
Track Drive Gearbox & Sprocket
Mounting Bolts - Check/Tighten
After the first 50 service hours and every 100, check the
M20 metric bolts (4) fastening the track drive gearbox to
the frame. Check bolt tightness using 460 ft-lbs (623 Nm)
torque wrench setting in a sequence that tightens them
diagonally across the perimeter of the bolt ring.
In addition, check the M16 metric bolts fastening the drive
sprocket to the track drive gearbox (4A) using 235 ft-lbs (318
Nm) torque wrench setting in a sequence that tightens them
diagonally across the perimeter of the bolt ring.
Also check the M16 metric bolts fastening the drive motor to
the gearbox using 235 ft-lbs (318 Nm) torque wrench setting
(Contact Rayco for further information.)
Track drive oil - Check
To check the track drive oil the drive unit must be placed in
accordance to the above figure and plug (5) removed. If oil
seeps out of the hole, the unit is full. When the oil level is
below the hole, fill the unit according to the instructions in the
“Track Drive Oil - Replace” section which follows.
Track drive oil - Replace
To change the oil in the track drive gearbox follow the
following instructions:
To drain the oil in the track drive, position the unit as in above
figure. The oil drain hole must be positioned straight down
(6) with the oil fill hole used as a pressure relief (5). Draining
the oil should always be done when the oil is hot, this will aid
in the draining and help prevent sludge. Replace plug (6)
and remove plug (5). Fill until oil reaches and starts to leak
out of plug hole (5). Replace all plugs and tighten. Use fluid
as noted in the “Fluid Specifications Section” of this manual.
Brake System - Test
The brakes on your crawler consist of hydrostatic braking
and spring applied, hydraulically released parking brakes. If
the machine has hydrostatic power to climb a slope, it has
sufficient hydrostatic power to brake the machine.
• Climb a slope with the machine.
• Stop on the slope and observe the machine
slowly creep backward. Shallow slopes will not be
enough to allow the machine to creep.
• While observing the machine creep backward down
the slope, apply the parking brake. The brakes should
lock immediately.
• If the brakes appear to malfunction, the cause should
be repaired immediately.
Maintenance
5
6
4
4A
Summary of Contents for C120R
Page 57: ...C120R Operator Service Maintenance Manual 800 392 2686 57 Maintenance ...
Page 65: ...C120R Operator Service Maintenance Manual 800 392 2686 65 Troubleshoot Use ULSD Diesel Only ...
Page 70: ...C120R Operator Service Maintenance Manual 70 A C Schematic 39965 Rev A ...
Page 71: ...C120R Operator Service Maintenance Manual 800 392 2686 71 A C Schematic 39965 Rev A ...
Page 72: ...C120R Operator Service Maintenance Manual 72 Hydraulic Hose Schematic 806134 Rev E ...
