Section 9 - Troubleshooting - Holland Atlas 55 Installation, Operation And Maintenance Manual

Troubleshooting
9. Troubleshooting
PROBLEM POSSIBLE CAUSE
Hard to Crank Turning the crank in the
Landing Gear wrong direction
Attempting to raise or lower
trailer in high gear.
Cross shaft binding.
Misaligned landing gear legs. Legs MUST be parallel and extend and retract evenly. Remove cross driveshaft and adjust landing gear legs
Lack of grease.
Damaged lift screw or nut.
Interference between powder
metal bushing or jackshaft of
gearbox and trailer mounting
surface.
Upper housing or retract tube
may be bent.
Excessive wear or damage
to pinion, bevel, input, idler
and/or output gears.
Bearing boss is pushed inside
housing.
Weld blow through where
strut bracket is welded to
housing.
Hard to crank landing Damaged collar.
gear under load only.
Damaged thrust bearing.
Crankshaft jams or Inner leg screw damaged.
skips while turning.
Worn, broken, or damaged
gears (missing teeth).
Landing gear will NOT Low input gear is frozen or
shift between gears. binding on the shift shaft.
Gearbox leg operates Broken/damaged cross
but opposite leg driveshaft bolt.
DOES NOT.
Broken/damaged cross
driveshaft.
Bevel gear pin/pinion gear pin
sheared in non-gearbox leg.
Bevel gear/pinion gear
damaged in non-gearbox leg.
Non-gearbox leg
Bevel gear pin/pinion gear pin
operates, but gearbox
sheared in gearbox leg.
leg DOES NOT.
Bevel gear/pinion gear
damaged in gearbox leg.
Both legs will NOT Damaged input, idler, and/or
operate, shift shaft output gear.
will turn but output
Gear pin(s) sheared in gearbox. Remove gearbox cover. Inspect and replace broken pins.
shaft DOES NOT turn.
Both legs will NOT Bevel gear pin/pinion gear pin
operate, but shift sheared in both legs.
shaft and output
Bevel gear/pinion gear
shaft turn.
damaged in both legs.
Legs locked and will Bent retracting screw or
NOT turn damaged riser nut and screw.
18
Refer to "Landing Gear Operation" for proper crank rotation.
Shift into low gear. DO NOT ATTEMPT TO LIFT OR LOWER IN HIGH
to the landing gear.
Inspect cross shaft bolts. Back off bolts to allow lateral (side to side) movement of the cross shaft.
Straighten or shorten cross shaft to eliminate binding.
to same height.
Grease landing gear legs as provided in the "Lubrication" section.
Check landing gear for signs of impact (accident) damage. Disconnect cross shaft and crank legs individu-
ally to determine which leg is damaged. Replace entire retract assembly or damaged leg.
Trailer mounting surface may need to be modified to ensure no interference between bushing or jackshaft
and trailer surface.
Replace damaged part(s) or landing gear.
Replace damaged gears.
Replace jackshaft and O-ring with jackshaft repair kit designed for landing gear models sold after January 2013.
Grind weld as required and re-weld. (With no-load on landing gear, the retract tube should have free play
inside the housing.)
Replace the collar
Replace the thrust bearing.
Examine the lift nut and screw of the inner leg assembly for impact (accident) damage. Replace
components or leg as necessary.
Examine pinion, bevel pinion and all gearbox gears for missing teeth or other signs of damage or wear.
Replace components as necessary.
Follow procedures in the Troubleshooting Guide XL-LG11424TS-en-US to restore easy shifting.
Replace cross driveshaft bolt.
Replace cross driveshaft.
Remove upper leg cover. Check for damaged or missing pins under bevel gear, or in pinion gear and
replace as necessary.
Remove upper leg cover. Check for damaged gears and replace as necessary.
Remove upper leg cover. Check for damaged or missing pins under bevel gear, or in pinion gear and
replace as necessary.
Remove upper leg cover. Check for damaged gears and replace as necessary.
Remove gearbox cover. Inspect and replace broken gears.
Remove upper leg covers. Check for damaged or missing pins under bevel gear, or in pinion gear and
replace as necessary.
Remove upper leg covers. Check for damaged gears and replace as necessary.
Check landing gear for signs of impact (accident) damage. Disconnect cross shaft and attempt to crank legs
individually to determine which leg is damaged. Replace entire retract assembly or damaged leg.
XL-LG20004UM-en-US Rev B · 2018-09-17 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND, SAF,
and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
RESOLUTION
GEAR. Doing so could result in damage