Clearwater Yarder Operator's Manual , Operational Constraints and Recommendations

Clearwater Yarder Operator's Manual

Operational Constraints and Recommendations

Do not operate the system at full throttle until the hydraulic system oil temperature reaches a minimum of 85° F or until the hydraulic system return pressure does not exceed 30 psi. To heat the oil, operate the engine at a fast idle with the clutch engaged, the hydraulic oil cooler fan "off," and all brakes "on."
Do not operate the yarder when the hydraulic oil temperatures exceed 180° F.
Do not move the yarder with the mast in the raised position. Hidden changes in the ground surface condition, obstacles, or soft ground could cause the yarder to tip over, damaging the unit.
Do not attempt to lift or hold a load completely off the ground with the skyline when yarding. The buildup in the line tension could cause the skyline to break. The skyline should be tight enough to lift (lead) the end of the log only. If it appears the log is going to be fully suspended at any time, lower the skyline. If the skyline span is quite long, intermediate supports may be necessary to provide sufficient lead for the log.
Check the condition of guyline anchors and the tightness of the guylines frequently. If any anchor shows signs of pulling out, select another anchor. If the guylines are loose, tighten them and then replumb the mast. If the top of the mast moves noticeably when a load is applied, it usually indicates a guyline to too loose and should be tightened immediately.
When raising or lowering the mast, clear all personnel and obstacles from the path of the mast's rotation.
Operate yarder's remote controls from a position near the yarder but clear of the mast guylines and moving logs. The complete yarding operation must be in view at all times.
At maximum engine speed, only small movement of the manual controller from the neutral (center) position is required to produce maximum line pull.
To prevent hydraulic oil from draining out of the reservoir when working on the hydraulic system, close the gate valve in the pump suction line. To prevent siphoning, loosen a fitting at the return filter. Open valve and tighten fitting before operating system.
When power is not required from the yarder, idle the engine to prevent excess heat buildup in the hydraulic oil and to conserve fuel.
When winches are not in use, the brakes should be "on".
Do not climb mast without the use of a climbing belt.