W. W. PATTERSON COMPANY
ratchet gear or brake band. Because the brake is somewhat complex, we recommend the following procedure when
inspecting or repairing it:
(a) Unbolt and remove entire brake band assembly
(b) Remove brake drum retaining washer
(c) Slide brake drum and ratchet gear off shaft
(d) Slide ratchet gear out of drum
(e) Remove pawls and springs
(f) Clean and replace any damaged or excessively worn parts
NOTE: Before re-assembly, coat working parts with a light
grade of motor oil--makes assembly easier.
RE-ASSEMBLY:
(a) Replace springs and pawls
(b) Align pawls so that sloping edges will engage sloping edges of ratchet gear teeth in final assembly (but keep
in mind the correct direction of rotation of the ratchet gear during pull-up)
(c) Push pawls into cavities and hold with dog-point
set screws mounted in face of drum near grease fittings
(d) Slide ratchet gear into drum bore
(e) Turn dog-point set screws back 1/2 turn only to free spring-loaded pawls. These set screws also act as keys
to keep pawls aligned correctly
(f) Replace brake assembly on winch
(g) Grease pawls moderately
RECOMMENDED LUBRICANTS:
Winch Gear Case: SAE 90 AGMA 6EP (KEYSTONE WG-1)
Gearmotor Gearhead: Same as above
Exterior Winch Bearings: General Purpose Grease (KEYSTONE
81 Lt.)
Butterfly Pawl: Molybdenium Disulfide Paste Lubricant
(KEYSTONE MOLY 29)
Diamond Shaft: Same as above
Guide Rolls:
Same as above
FINISH COATS:
1st coat: EZ-2 DIMETCOTE (INORGANIC ZINC)
2nd coat: Catalyzed Epoxy Tie-Coat Primer, MIL. SPEC. P-23377
3rd coat: Haze Gray Silicone Alkyd Enamel TT-P-490E
4th coat: Same as 3rd.
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