Snorkel TL49J User Manual

Page 3 - 13TL49J
GROUND CONTROL VALVE
This valve is identical to the platform control valve
except
• It is not possible to operate the platform slew
from the ground controls. On the ground con-
trol valve schematic shown in Figure 3-10, the
last spool is that of the platform slew.
• A high pressure carry over plug has been
tted to the ground control valve to allow oil
under full system pressure to pass through
it. Without the internal plug, it is impossible
to operate the platform valve as all the oil will
ow directly back to the tank.
If it is necessary to operate the ground control valve,
make sure the carry over plug is tted. The plug is
found inside the valve under the tting for the return
line. Shine a light down the port to make the Allen
head grub screw visible. If not in place, use the
head grub screw tted to the replacement valve.
Incase of an oil leak from the valve block, it is most likely to be from the end cap. This refers to either
the end where the lever is or at the opposite end where the return spring is. Never fully withdraw
the spool. Push it out opposite to where the leak is coming from with sufcient space to clear the
“O” ring which can now be observed with a small screw driver. Apply plenty of grease and keep well
lubricated when pushing the spool back in. If the spool is not centring, check that the return spring
and the end cap is well secured.
DIVERTER VALVE
When the diverter valve is not activated (no power on
the coil), the oil will ow to the outrigger control valve.
When activated, the oil ows to the ground control
valve. Incase of a reduced ow and a high pres-
sure drop over the valve, the valve could be sticking.
Remove the cartridge from the aluminium body and
clean. Also look for contamination in the valve or
valve cavity.
To check that power is reaching the coil, hold a
screw driver against the end of the coil. When the
SERVICE AND REPAIR
Figure 3-9: A view of the platform controls and check valve location.
Figure 3-10: Ground control valve.
Figure 3-11: Diverter valve schematic.
Courtesy of Crane.Market

Snorkel TL49J Specifications

General

Brand	Snorkel
Model	TL49J
Category	Lifting Systems
Language	English