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 TB 740-97-4
systems will be filled to operating level with approved fluid and operated during the preservation cycle of the engine. Any exposed
exterior ferrous surfaces of the hydraulic systems will be coated with P-10, preservative lubricating oil, type I or II, grade 30.
b. Mechanical Type. Mechanical reduction gears having separate lubricating systems will be inspected for level of lubricant and
for evidence of water and contamination of lubricant. Add lubricant specified by the applicable lubrication order to raise existing
lubricant to operating level, or if contaminated, drain the lubricant and flush the gear housing with type P-3 preservative. Agitate with
dry compressed air and thoroughly drain. The cleaned gear case will be filled to operating level with approved lubricant and operated
under no load to insure coating of all interior surfaces and components. If impracticable to operate, agitate the lubricant with dry
compressed air sufficiently to insure coverage of gears and internal parts of the housing. The flexible tube employed for air agitation
will be of a smaller diameter than the opening of the housing so that pressure will be released simultaneously with the agitation
process.
33. Inclosed Gears. Oil lubricated gears not otherwise provided for will be inspected for level of lubricant and for evidence of water
and contamination of lubricant. Add lubricant specified by the applicable lubrication order to raise existing lubricant to operating level
or if contaminated, drain the lubricant, flush the gear housing with type P-3 preservative. Agitate with dry compressed air and
thoroughly drain. The cleaned gear case will be filled to operating level with approved lubricant and operated under no load to insure
coating of all interior surfaces and components. If impracticable to operate, agitate the lubricant with dry compressed air sufficiently
to insure coverage of gears and internal parts of the housings. The flexible tubing employed for air agitation will be of a smaller
diameter than the opening of the housing so that pressure will be released simultaneously with the agitation process.
34. Exposed Gears. Non-precision exposed gears subjected to the weather will be coated with type P-1 preservative. All other
exposed gears will be coated with type P-2 preservative.
35. Drive Belts and Pulleys. The tension of all drive belts will be released. Pulley grooves will be coated with a thin film of rust
inhibiting lacquer resisting synthetic primer conforming to FED-TT-P-664.
36. Exposed Drive Chains. Exposed drive chains will be coated with type P-3 preservative. Sufficient time will be allowed for
excess preservative to drain from the chain. After draining the chain will be coated with type P-11 preservative.
37. Clutches and Related Components. Drive clutches and related components will be preserved as follows:
a. Dry Disc Type. Cover plates will be removed and the clutch disengaged. All accessible interior components of the clutch
will be coated with a thin film of rust inhibiting lacquer-resisting synthetic primer conforming to FED-TT-P-664. Spring loaded disc
type clutches will be blocked or secured in a partially disengaged position to eliminate contact between the disc facing and pressure
plates. Do not block spring loaded clutches entirely open, because prolonged complete depression of clutch springs will cause loss of
tension. Clutch equipped with snap-over-center or toggle-in devices will be completely disengaged.
b. Band and Shoe Type. Clutch drum facings, clutch control mechanisms inclosed within housings, and exposed clutch control
mechanisms will be coated with a thin film of rust inhibiting lacquer-resisting synthetic primer conforming to FED-TT-P-664.
c. Cone Type. Coat the unlined surface of cone type clutches, clutch control mechanism inclosed within housings, and
exposed clutch control mechanisms with rust inhibiting lacquer-resisting synthetic primer conforming to FED-TT-P-664.
d. Jaw Type. Coat clutch jaws, shifter yokes, and machined surfaces of shafts with type P-2 preservative. Coat unpainted
exposed surfaces of clutch control mechanism enclosed within housing with rust inhibiting lacquer resisting synthetic primer
conforming to FED-TT-P-664.
e. Clutch Air Cylinder. The drain plug will be removed and type P-9 preservative will be atomized sprayed into the cylinder
through the drain plug opening. The plug will be reinstalled. The exposed surfaces of the piston rod will be coated with type P-11
preservative.
f. Hydraulic Clutch Control. Where the clutch is operated by a hydraulic system, the hydraulic housing will be filled to
operating level with approved operating fluid The exposed surfaces of the piston rod will be coated with type P-11 preservative.
38. Brakes.
a. Hydraulic Brake Systems. The hydraulic system will be filled to operating level with approved hydraulic fluid required by the
applicable lubrication order or technical manual.
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