jcb 411HT, Service Manual

Page: 19 / 51

01 - Machine
03 - Safety
27 - Maintenance Positions
01 - 13 9813/2850-3 01 - 13
Lift Arm Raised
Figure 3.
If you must raise the lift arm to get access to perform
a non-routine maintenance procedure, a lift arm
support devices must be used.
Lift arm support devices are supplied with a machine
as an option and your machine may not be equipped
with them. Do not attempt to carry out maintenance
operations beneath a raised lift arm unless you use
the correct lift arm support devices.
Install the Maintenance Struts (If supplied)
1. If necessary, empty the shovel.
2. Make sure that the machine is parked correctly in
the straight-ahead position on solid, level ground.
3. Make sure that the park brake is engaged and
the transmission is in neutral.
4. Raise the lift arm sufficiently to install the
maintenance struts.
5. Run the engine at idle for a few minutes to let the
turbocharger cool.
Duration: 2–3min
6. Stop the engine.
7. Remove the ignition key.
8. Put chocks on both sides of all the wheels.
9. Install the articulation lock. Refer to (PIL 06-27).
10. Remove the maintenance struts from the tool
box.
11. Install the maintenance strut in correct position
around the ram.
12. Make sure that the maintenance strut is seated
correctly on the ram.
13. Install the strap around the maintenance strut
and the ram.
14. Start the engine.
15. Slowly lower the lift arm onto the maintenance
struts. Stop the movement immediately when the
maintenance struts support the weight of the lift
arm.
16. Be careful when you lower the lift arm onto the
maintenance strut. 'Feather' the control lever to
lower the lift arm slowly.
17. Stop the engine.
18. Remove the ignition key.
19. Remove the battery isolation key. Refer to (PIL
33-03).
Figure 4.
A
B
D
C
A Maintenance strut 1 B Strap 1