CONNECTING ROD & PISTON GROUP 4N0658 - Caterpillar

It is possible for the frame of the harvester head to fall when parked in the vertical position. To avoid personal injury or death and equipment damage, fasten the safety chain to the frame and the felling link. Secure the chain in an appropriate manner.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Accidental machine starting can cause injury or death to personnel working on the machine.To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key. If the machine is not equipped with a battery disconnect switch, disconnect the battery cables from the battery and tape the battery clamps.Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.
Never use dull or worn saw chains. Never use worn or damaged saw bars.Personal injury or death can result.Always follow the manufacturers recommendations and requirements regarding the proper use and maintenance of saw chains and saw bars.
Illustration 1 g00861417
Top Saw
Illustration 2 g00873914
Control Valve (Top Saw)The control valve is mounted on the upper part of the frame under the access cover.Top Saw Adjustments
Before you make any adjustments to the top saw disconnect the hydraulics and the electrical power to the main saw motor and the saw bar cylinder on the harvester head.Lubrication Oil
Illustration 3 g00873915
(1) Lubricating adjusting screw. (2) Adjusting screw (Saw bar feed).In order to adjust the volume of lubrication oil for the chain, turn screw (1) outward. Press the saw button while you adjust the screw. The volume of oil should be approximately 1 drop per second. The valve is mounted on the frame under the access cover.Set Speed of the Saw Bar
The speed must be set so that you have an approximate time of 1.5 - 2.0 seconds for full stroke of the saw bar. Connect the wire for saw bar. Do not run the saw motor.Press the button for the top saw and speed control.Use adjusting screw (2) in order to adjust the speed of the saw bar. Turn the adjusting screw (2) until the speed of the saw bar is correct.Home Position Saw Bar
Adjust the length of the saw bar cylinder so that the front edge of the saw bar will be parallel with the front edge of the top saw housing. Loosen the nut on the cylinder rod. Turn the rod clockwise or counterclockwise until the saw bar is in the right position. Lock the nut.