2.
Check the cab travel path for obstructions.
3.
Press and hold the button on the pump to begin
moving the cab to the operating position.
NOTE: To slow the cab descent, reverse the tilt
pump lever after the cab passes the balance
point.
4.
Allow the cab to lower to the safety stop, then
move the safety stop away from the right tilt cyl-
inder rod. See
Fig. 2.16.
5.
Press and hold the button on the pump until the
cab nears a 45-degree angle (the balance point).
See
Fig. 2.15. Once the cab goes beyond 45
degrees, release the button on the pump and
move the tilt pump lever to the TILT position in
order to slow cab descent.
IMPORTANT: If the cab stops after it has gone
beyond 45 degrees, don’t force it down with the
tilt pump. The safety stop is in the locked posi-
tion or, the velocity fuses have locked the tilt
cylinders. Release the safety stop or, to unlock
the fuses, see Hydraulic Lockup, below.
6.
Move the pump lever to the RETURN position.
7.
Check the indicator pin on each cab latch. The
latches are locked when the pins have moved
back into the piston and cylinder spring assem-
bly.
NOTE: Maintain the hydraulic oil level at the oil
fill plug. Add oil only when the cab is in the op-
erating position. Use only Freightliner-approved
hydraulic oil. See Group 60 of the Century
Class Trucks Maintenance Manual.
8.
Close the grille.
9.
Switch off the tilt system dash switch.
Hydraulic Lockup
Hydraulic lockup can occur for the following reasons:
•
very cold temperatures
•
use of the wrong hydraulic fluid
•
air in the system
•
sudden cab movement
•
ruptured hydraulic line
•
continued pumping after the cab goes over-
center
•
tilt strut in locked position while lowering the
cab
03/27/98
f000896
A
B
C
A. Upright or Operating Position
B. 45° Tilted Position (balance position)
C. Full-Tilt Position
Fig. 2.15, Cab Tilt Positions
04/15/93
f310358a
1
2
3
1. Safety Stop
2. Tilt Cylinder Rod
3. Tilt Cylinder
Fig. 2.16, Safety Stop Disengaged
Vehicle Access
2.11
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