B.
Consumable Materials
(1)
D00633 Grease - BMS 3-33 (Recommended)
(2)
D00013 Grease - MIL-G-23827 (Alternative)
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(3)
G01395 Compound, Corrosion Preventive - BMS 3-27
C.
References
(1)
AMM 07-11-01/201, Jacking Airplane
(2)
AMM 32-00-15/201, Landing Gear Door Locks
(3)
AMM 32-11-22/401, Main Gear Downlock Springs
(4)
AMM 32-32-02/401, Main Gear Downlock Actuator
D.
Access
(1)
Location Zones
731/741 Main Landing Gear (MLG)
732/742 MLG body doors
733/743 MLG oleo doors
E.
Install the downlock assembly.
S 094-014
(1)
Remove the downlock springs, if they are installed
(AMM 32-11-22/401).
S 414-015
(2)
Install the downlock in the apex of the downlock links.
S 644-024
(3)
Apply grease to the shaft of the upper spindle and apex pin.
S 494-033
(4)
Install the thread protector on the apex pin.
S 624-034
(5)
Apply compound to the splinded and tang washer, the antirotation bolts, washers, nuts and the threads of the castellated nuts.
S 424-035
CAUTION: WHEN YOU INSTALL THE DOWNLOCK ASSEMBLY THE HEAD OF THE MIDDLE
_______ PIN MUST FACE DOWN. IF THE ASSEMBLY IS NOT INSTALLED CORRECTLY DAMAGE TO EQUIPMENT WILL OCCUR.
(6) Hold the downlock assembly in the installed position between the upper and lower side struts and with the downlock spindle in the upper support fitting.
NOTE: The middle pin of the downlock assembly is the only pin
____ that is installed with the head down. The other pins are installed with the head up, the pin will not fall out if the antirotation bolt breaks.
S 414-025
(7)
To attach the downlock spindle to the upper support fitting, do the steps that follow (View B-B):
(a)
Apply compound to the threads of the downlock spindle.
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(b)
Install the splined washer and spindle nut, hand tight, on the downlock spindle.
(c)
Tighten the spindle nut 480-600 pound-inches.
(d)
Apply grease to a 0.003-0.005 inch thick feeler gage or shim.
(e)
Loosen the spindle nut until you can position the feeler gage between the spindle nut and the splined washer.
(f)
Tighten the spindle nut 60-120 pound-inches.
NOTE: As you tighten the nut, make sure the feeler gage
____
stays in position.
(g)
Remove the feeler gage or shim.
(h)
Install the antirotation bolt, washer, nut and cotter pin.
NOTE: If needed, you may loosen the castellated nut to the
____
nearest lock position
(i) Remove the excess compound.
S 424-036
(8)
Hold the downlock spring retainer, the upper and lower side strut and the downlock assembly in the installed position (View A-A).
S 424-040
(9)
Install the apex pin.
S 424-039
(10)
To attach the apex pin to the downlock assembly and side strut, do the steps that follow (View A-A):
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