SILVI-CREW LTD

SPACING SAW TRAINING PROGRAM: MODULE 5

ADVANCED FILING AND MOTOR MECHANICS

OBJECTIVES

This module is designed to provide the student with Ì Ìan indepth understanding of the filing angles, their design and function, and methods of achieving these angles during regular maintenance and repair filing. The interaction of daily and periodic preventative maintenance schedules are introduced and examined in terms of repair free operation. Finally the concept of time parameters involved with time and motion productivity studies of precommercial thinning operations.

"PREREQUISITES

Module 1. INTRO TO SPACING SAWS AND PERSONAL SAFETY GEAR

Module 2. INTRO TO MAINTENANCE AND REPAIR PROCEDURES

Module 3. GENERAL PREPARATIONS FOR SPACING SAW WORK

MATERIAL COVERED

A.) Filing Techniques and Modifications

B.) Time and Motion Parameters

C.) Daily and Periodic Maintenance Schedules

D.) Repair Procedures

STUDENT PERFORMANCE EVALUATION:

Each student must demonstrate satisfactory filing and discuss the design and function of filing angles. This includes possible modifications of these angles with respect to the season of cutting operation and the species of trees being cut. The interaction mechanism between preventative and repair maintenance must be understood. The interaction of time parameters during the scheduled day must also be discussed with emphasis on minimizing non(c)productive time and maximizing actual productive time

"RESOURCE MATERIALS

• FLIP CHART,
• OVERHEAD PROJECTOR,
• VHS VIDEO AND MONITOR
• SILVI-CREW TRAINING MANUALS
• EQUIPMENT SUPPLIERS TRAINING PAMPHLETS
• Windsor Filing Manual Husky Operators Manuals Spare Parts Sheet
• DNR TRAINING PAMPHLET

SILVI-CREW LTD. INSTRUCTOR'S LESSON PLAN Module 5

SUBJECT: Spacing Saw Training Program

A. Filing Techniques and Modifications

Three critical angles and their function are discussed below. Also, the filing position and stroking action is examined.

a. Review of filing angles - top plate filing angleœ and function 15 - 20 degrees - the angle across the top of the cutter - from the file guide PURPOSE - controls aggressiveness sideways into the wood.

MODIFICATIONS - hardwood - softwood - winter - summer - top plate cutting angle and function 45 - 60 degrees - the angle under the top plate - results from diameter of file and height of handle PURPOSE - to lift chip up and out of the cutting area.

MODIFICATIONS

HW, SW, winter,summer - side plate filing angleœ and function 0 - 10 degrees - viewed from the outer side - from the cutting corner down - results from diameter of file and height of handle PURPOSE - controls the "feed" into the wood, must be slight hooked

MODIFICATIONS

• Modifications for rocky areas. chisel to semi - chisel filing
• Gullet removal
• Characteristics of dull blades - shiny worn cutting edge - excessive hook - no hook or laid back hook - uneven filing angles top plate filing angle top plate cutting angle side plate filing angle - blunt corner and edges - burning on stump and blade.
• List of advantages of the file guide - greater accuracy and conformity (of all teeth) filing - depth of filing regulation which creates the hook of the side plate filing angle- easier filing

B. Time And Motion Parameters

Flow Chart with explanations

• Production Time
• Service Time Daily Maintenance - clean air filter - clean exterior - check nuts & bolts - checking blade - angle gear grease - filing Periodic Maintenance - checking tower - checking/cleaning blade guard - adjust throttle spring - adjust choke spring - clean starter - adjust/clean spark plug - clean cooling fins - changing blades - harness adjustment.
• Repair Time - repairing starter - replacing springs - replacing muffler - repair filing - replacing tower unit etc.
• Operational Lost Time - talking to foreman - quality control check plot - walk in/out - weather
• Personal Time - talking to other cutters - lunch and breaks etc.- Data Collection Sheet.

C. Daily Maintenance Schedules

• Review of Starting Procedures
• Daily Maintenance Procedures ÌÌÌ-Ìa. cleaning of the air filterÞ-AÞ
• Cleaning of exterior (starter ‰‰‰ vents)
• Checking nuts and bolt (c) muffler (c) handlebars (c) etc.
• Checking angle gear grease
• Filing as above.

D. Periodic Maintenance Procedures

• cleaning blade guard
• spark plug maintenance
• checking tower
• changing blade and /or nut
• harness adjustment
• throttle lube and spring adjustment
• adjusting choke spring
• cleaning of starter mechanism
• choke spring adjustment
• cleaning cooling fins
• carburetor adjustments high/low jet adjustment /and throttle idle screw before adjustment check that air filter is clean - spark plug properly gaped - fuel filter is clean - properly mixed fuel, water free - unclogged muffler.

Use caution while adjusting. Do not screw jet screws in to deep. From a closed position, open high jet 3/4 turn and open low jet 1 full turn. "Throttle idle adjustmen Start saw and let it warm up (2 - 3 min.) Turn throttle screw clockwise until the blade turns. For final adjustment, turn screw back, counter(c)clockwise until the blade is steady with the engine in smooth idle. "Low jet adjustment• From the idle position, turn low jet screw clockwise. Engine speed will increase to a point and then decrease. Find this position of maximum speed, then turn the screw back counter-clockwise 10 to 15 minutes on the clock face (< 1/4 turn). Check acceleration of throttle. "High jet adjustment" Brace saw and bring it to full throttle. Turn high jet screw until it reaches 11,500 rpm. Measure this with a tachometer. To high means to hot operation meaning shorter engine life. Experienced operators can make this adjustment by ear, but a tach is recommended.

E. Repair Potentials

• Replacing starter mechanism - pull chord - spring - starter dogs / springs
• Replacement of the tower unit, handle bars and tube
• Replacement of muffler
• Replacement of clutch
• Repair filing as above
• Repair of carb assembly