MAHLE CML-7, Руководство по эксплуатации

Страница: 32 / 44

Maintenance and Inspection
13.4 Bleeding air from hydraulic cylinder
If the lift carriage is spongy or jumpy when either raising or
lowering with no load, there is most likely air trapped in the
cylinder. To remove the trapped air, perform the following
steps
:
1.
Make sure there is no load applied to the lift unit
.
2.
Open the door by releasing the latch on the right side
.
3.
Raise the carriage by pushing up on the manual
raise/lower toggle switch and pushing in on the manual
raise push button (Fig. 17, Pos. 3). Raise the carriage
approximately two feet off the ground
.
4.
Position a ladder behind the lift unit so you can reach
the top of the cylinder. Use a 6 mm hex key to slightly
loosen the vent screw (do not fully remove the vent
screw) in the top on the cylinder (Fig. 19) while
surrounding the port with a clean rag. You will hear the
air escaping
.
Fig. 19: Cylinder vent screw
1
Vent screw
5.
When oil starts to escape past the vent screw, retighten
the vent screw. It may take some time to purge all the
air depending on the amount of air trapped in the
cylinder
.
6.
The air will now be purged from the system. Clean up
any oil residue that escapes from the cylinder
.
7.
When you get down from the ladder, lower the carriage
by pushing down on the manual raise/lower toggle
switch and opening the needle valve on the power unit
(Fig. 17, Pos. 1)
.
8.
To make sure no additional air gets into the system, the
oil level in the hydraulic reservoir should be checked to
ensure the reservoir has the proper oil level. Refer to
“Adding hydraulic fluid” section for more information
.
CML Series | 32 | en
13.5 Down stop catch pawl lubrication
If the down stop catch pawl is not rotating forward and
backward freely it may be in need of lubrication as
described in the steps below
.
If after lubricating the down stop catch pawl, the pawl
still does not rotate freely forward and backward, do not
use the lift unit. Contact the manufacturer using the
contact information on the back of this manual
.
1.
Open the door and locate the two grease fittings shown
in Fig. 20, Pos. 1
.
Fig. 20: Down stop grease fittings
1 Vent screw
2.
Wipe the top of the grease fittings with a clean rag and
apply good quality lithium grease to the grease fittings.
Only apply 1-2 shots of grease to each fitting. Excessive
greasing can cause the down stop catch pawl to
operate slowly and is not recommended
.
3.
Clean up any excess grease that is present
.
