Page 3-11
Maintenance 3.8 - Setting Hydraulic Pressures
TL38 Service & Parts
3.8 SETTING HYDRAULIC PRESSURES
Check the hydraulic pressures whenever the pump, manifold, or relief valves have been ser-
viced or replaced.
MAIN RELIEF VALVE
1. Operate the hydraulic system for 10-15 minutes to warm the oil.
2. Remove the cover from the 1st post.
3. Insert pressure gauge into high pressure gauge port marked ‘PT’ on top of front face of main
manifold block.
4. Loosen locknut on main relief valve and turn adjusting screw counter clockwise two full turns.
5. Operate telescope-in function switch at lower controls and keep it activated.
6. Slowly turn the main relief valve adjusting screw clockwise until the pressure gauge reads 155
Bar pressure.
7. Release Telescope-in switch.
8 Tighten locknut on main relief valve while holding the adjusting screw in position.
Figure 3-4: Hydraulic Manifold
WARNING
!
!
The hydraulic oil may be of sufficient temperature to cause burns. Wear safety
gloves and safety glasses when handling hot oil.
The oil in the hydraulic system is under very high pressure, which can easily
cause severe cuts. Obtain medical assistance immediately if cut by hydraulic oil.
Slew cross-line
relief valves
Main Relief
Valve
Test Port
To Next Page
Loading...
