Airglas, Inc.
Manual # LH4000-106
20 |
P a g e
MANUAL REVISION B
December 3, 2012
THIS MANUAL INCLUDES INFORMATION PROPRIETARY TO
Airglas, Inc.
AND SHALL NOT BE USED TO MANUFACTURE OR REPRODUCE ANY PART OR
ASSEMBLY WITHOUT THE PRIOR WRITTEN PERMISSION OF
Airglas, Inc.
selected. When the cycle is complete, a second (Wheels Locked) green light will illuminate and
stay on to confirm retraction of the skis. When the switch is released the selector light will
extinguish, but the position locked light will remain lit as long as the skis are retracted.
6.0 SERVICING INFORMATION
Mechanical System –
The skis themselves are virtually maintenance free with the top of the
ski constructed of a thermal plastic composite and the bottom of the ski is Ultra High Molecular
Weight Poly-ethylene (UHMW). The ski bottom has two runners that run the forward length of
the ski and are made out of ¼” UHMW. Replaceable stainless steel runners are provided at
the aft end of the ski. The runners are designed to give tracking stability to the ski and protect
the bottom of the ski. When the runners have worn to a thickness of less than .125”, they will
need to be replaced. Waxing the ski bottoms for decreased friction and improved glide is
recommended, especially in wet snow.
The Yoke Assembly (LH3600-5), and Retaining Rod (LH3600-5-5) need to be checked for
security and proper lubrication. Yoke pivots require light greasing (with any multipurpose
heavy duty wheel bearing grease) every 25 hours and the rod ends will need light oiling (with
LPS-2 or equivalent low viscosity oil) every 25 hours. The yoke is made out 4130 Chromalloy
steel and is heat treated after welding (no field repairs are allowed). The (LH3600-10) Yoke
Safety Restraining Cable system is designed to keep the yoke from traveling over-center in the
unlikely event of a rigging failure.
The Tail Wheel Bracket Kit (LH3600A-12) is made of stainless steel angled brackets with 6”
aluminum wheels with a solid urethane tires. The cartridge wheel bearings cannot be serviced
and should be replaced when worn. When the tire is worn to a thickness of less than .25” the
wheel should be replaced.
The rigging is made up of galvanized steel 5/32 cable for the ice cutter, safety cable, and
natural rubber 8020CW cold weather bungee rings for the front assembly and 5/32 cables for
the check cable assembly. The bungees should be kept out of direct sunlight and must not
come in contact with fuel or other chemicals. Any fraying of the sheathing should be noted
and inspected for rubber strand damage or degradation. Swaged ends and cables should be
inspected for fraying and slippage. Hardware should be inspected for security.
Hydraulic System
– The hydraulic system supplied with the skis uses an Electric/Hydraulic
Pump, (a hand pump is optional but not offered through Airglas, Inc.) to pump fluid to a
hydraulic actuating cylinder mounted on the ski. The Electric/Hydraulic Pump is intended to be
mounted behind the cabin area aft of station 108. Hydraulic lines are routed through the
aircraft under the floor and out to the gear legs. The air is bled from the hydraulic system by
6.0 SERVICING INFORMATION-CONTINUED
