Snorkel TL37J-sn7500 - Manual (Page 32)

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Slew Drive Gears.
The slew drive gear is designed to be largely maintenance free. However, we recommend the
gear teeth be greased on a monthly basis with a high pressure grease. Additionally, the ring
gear and gear box should be greased on a six monthly basis. The grease nipple 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 appropriately.
The ring gear should be inspected on a six monthly basis for excessive play. It is unlikely there
will be any wear if the machine is maintained correctly.
To check the gear, place a payload of approximately 80Kg in 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 0.5mm movement between the
inner and outer bearing rings.
Checking Limit Switch Operation.
The limit switches require no maintenance, other than a visual inspection, on a pre operation
basis. This is an important check, to ensure the switch is not mechanically damaged, and
the roller is always in contact with the cam, when not under load.
The switch operation can be simply checked, by observing the LED display when deploying the
stabilizers. As an outrigger foot touches the ground and becomes loaded, the appropriate light
will change to green. This indicates that the switch contact has operated correctly
If the LED displays green at any other time then the machine must not be operated, until the
fault is rectified.
MAINTENANCE
Grease
Nipple
Grease
Nipples
Outriggers
under load Outriggers NOT
under load