Snorkel TL37-01-007625, Parts Manual

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Page 3 - 28 TL49J
SERVICE AND REPAIR
for the ring gear is on the top face of the slew gear set
between the fixing bolts. It can be accessed by lifting
one of the side covers and slewing the structure ap-
propriately.
The ring gear should be inspected on a six monthly
basis for excessive wear. It is unlikely there will be any
wear if the machine is maintained correctly.
To check the gear, place a payload of approximately
80 Kg on the platform. Elevate the lower boom to
approximately half way. Then, gently elevate the top
boom whilst observing the ring gear. Excessive wear
will be observed by noticing more than 0.5 mm move -
ment between the inner and outer bearing rings. If
excessive wear is present, the gear ring should be
replaced.
SLEW STOP
The slew stop mechanism is fully lubricated and should normally not require any further lubrication.
Should more lubrication be needed, this can be done in two ways;
1. When greasing the slew bearing, some grease will drop into the centre part of the slew. Keep
on greasing the slew bearing until grease escaping becomes visible from the outside sealing
lip on the slew gear. Keep on greasing as the grease will now be pushed out through the outer
and inner sealing ring of the slew bearing. Grease escaping from the inner seal will drop unto
the slew stop ring.
2. LPS-3 lubrication can also be sprayed between the slew tube and the chassis plate.
The slew stop mechanism is very simple and prevents the cables and hoses getting tangled up by
continuous rotation. The slew stop ring will allow the operator to turn almost 360° in each direction from
the stowed position.
The critical parts of the slew stops are as follows:
• Chassis stop
• Slew stop ring
• Slew stop ring tab
• Slew tube stop
When slewing (rotating), the slew tube stop will pick up on the slew stop ring tab and drag it around
until the slew stop ring tab hits the chassis stop. It is possible to slew almost two turns in the opposite
direction until the slew stop ring tab hits the chassis stop again. This provides almost two turns (lock to
lock). From the parking position, this equates to one left turn or one right turn.
Figure 3-37 : Location of the slew drive
gears.
Figure 3-38 : Different procedures of
lubrication.
Figure 3-39 : Critical parts of the slew stop.
Slew Tube
Spray LPs-3
inbetween the
tube and the
chassis plate
Slew Stop
Ring Tab
Slew Stop Ring
Chassis Stop