Clearwater Yarder Operator's Manual , Servicing

Clearwater Yarder Operator's Manual

Servicing

Lubrication

Table 1—Lubrication Chart
	50 hours or weekly⁸	100 hours or biweekly⁸	250 hours or monthly⁸	As required
Guyline winch bushings (two fittings each winch)¹			X	X
Skyline, mainline, haulback, winch drum bearings (one fitting each drum)¹	X
Fairlead sheaves (one fitting each sheave)¹	X
Guyline sheave (one fitting each sheave)¹		X
Mast hinge pin (two fittings)¹			X
Clutch (one fitting)¹	X
Engine oil and filter²		X		X
Engine air filter²		X		X
Engine fuel filter				X
Gear box³				X
Hydraulic oil⁴				X
Hydraulic oil filter⁵				X
Hydraulic pump control linkage⁶		X
Guyline rachet assembly⁶				X
Hydraulic pump activator filter⁷				X
¹Use a good grade multipurpose molybdenum disulfide grease. ²Use a good grade multi-viscosity SAE 10W-40 011, or, In the case of dry type air cleaner, replace element. ³Use a multipurpose gear lubricant type API-G L4-90W, and change only If contaminated. ⁴Use Dexron-II automatic transmission fluid. Change only when oil Is contaminated or smells burnt. Remove the drain plug from the hydraulic 011 reservoir and drain any collected water from the tank each season. ⁵Change only when the filter indicator indicates a change is necessary or If the hydraulic system has been opened up for major repairs or inspection. (After major repairs or inspection operate the unit approximately 40 hours and change filters again.) ⁶Use a light lubricating oil (engine oil). ⁷Clean filter when and if pump controls seem sluggish. See pump activator Installation and service manual for procedure. ⁸Whichever comes first.

Inspection

All welds and structures subjected to high stress should be inspected weekly. These areas are:

Mast raising/lowering mechanism, including the crossbar lifting box and its attachment welds, cylinder lifting lug (both ends). and the cylinder (rod, clevis, and pins) (figure 6)
Mast hinge area (figure 6)
Fairlead assembly and attach points (figure 11)
Guyline sheave block attachment lugs (figure 11)
Mast-to-frame welds
Main winch support brackets and supporting structure (figure 12)
Mast area in general

Photo of the mast of the yarder.
Figure 11—Fairlead assembly.

The inspection should consist of a visual inspection of all welds for cracks or breaks, bent or deformed components and structures, and loose or missing nuts, bolts, pins, and their retainers. This inspection should be accomplished not only weekly but any time the yarder is subject to shock loading such as falling trees across tensioned skyline, skyline or guyline breaking under heavy load or skidding logs into the unit, and other similar situations.

Any time cracked or broken welds, bent or deformed components or structures, or missing components are detected, shut down the yarder immediately, determine the cause of the problem, make corrections and repairs. All welding should be done by a certified welder.

The operator must always be observant of the structural condition of the yarder.

Photo of winch support brackets.
Figure 12—Winch support brackets.