Wipaire WIPLINE 13000, Руководство по обслуживанию

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SERVICE MANUAL & ICA
WIPLINE 13000 FLOATS
P/N 1002548 Revision H Page 29
2.5 SERVICE NOSE AND MAIN GEAR RAMS
Lubricate the nose and main gear cylinder mounting flanges with MIL-H-5606 Hydraulic Fluid thru the oilers. The
nose has a flip-lip type oiler and the mains have a ball-needle type oiler. The purpose is to wet the felt wiper so it
pre-lubes the penetration rams and enables the seals inside to work and not become damaged over time.
ADJUSTMENT/TEST
NOSE GEAR
Adjustment of actuator stroke is provided at the ends of the piston rods. The length of the nose gear rod is
adjusted such that the over-center knuckle (brass) rollers just bottom out on the down side and the piston just
bottoms out on the mounting flange at the same time.
The up stops nests in the up-stop bolt. See figure 2.9 and 2.10 for locations and assembly. Nose gear proximity
switches are located on clips that are mounted on the outer cylinder body, one on each end. The most forward
switch is for the gear down lights and most aft is for the gear up position lights. Set the proximity switch mounting
clip along outer cylinder body to a position such that the light goes out when the over-center track is about ¼
inch from bottomed position while traveling in the up direction. Lights should come on about 1/8 inch from the
bottomed position while traveling in the down direction. The cylinder piston has a magnet that will activate the
proximity switches.
MAIN GEAR
The main gear actuator cylinder is not adjustable. These are pre-set at the factory to ensure that the main gear is
locked at the end of each stroke and that correct indication is given on the cockpit console. The up and down lock
may be adjusted so the lock is fully engaged by adjusting the set screws shown in figure 2.4. Loosen the jamb nut
adjust and tighten jamb nut.
The service intervals on the Main Gear Actuators should be every 25 hours if the aircraft is regularly taxiing on
sand and gravel. Otherwise they should be cleaned and serviced according to the checklists from the back of this
manual. Clean the slide tube with clean solvent remove any buildup of dry or dirty lubricants. Inspect the slide
tube for erosion and/or nicks and protrusions caused by gravel or debris being thrown by the Main Landing Gear
tires. Grease the actuator mechanism with HCF grease, p/n 605, or equivalent and wipe the slide tube down with
a clean rag soaked in lubricant.
The main gear proximity switches are located on each end of the gear stroke. The forward switch is located on
the forward side of the gear tunnel. It is accessible through the top deck access cover. The aft proximity switch is
located on the float bulkhead just aft of the wheel well, accessible though the float top deck cover.
The main gear proximity switches are adjusted loosening the mounting screws and positioning them as such that
the light goes out when the lock hook is raised about 1/8 inch off its nested position and comes on again upon
nesting.
BLEEDING HYDRAULIC SYSTEM AFTER SERVICE
The system automatically bleeds, provided sufficient oil is maintained in the reservoir. To check the fluid level, fill
the reservoir with hydraulic oil and cycle the gear. The fluid level should be maintained in the upper one third (1/3)
of the sight glass. If the reservoir empties (i.e. fluid disappears in sight glass) stop the cycle by pulling the circuit
breaker on the control panel. Fill the reservoir again and complete the cycle. Continue this procedure until the
fluid level in the reservoir stabilizes (it will vary in level between up and down positions). If the fluid level continues
to decline during gear cycles, check for external leaks. Generally, the fluid level in the site glass should be about
¾ full when the gear is down.