Quinton ST 55, Service Manual

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4-2 Repair/Replacement and Calibration Cardiac Stress Treadmills Service Manual
Mechanical Hazards
Warning! Be sure the treadmill power cord is unplugged before
working with chains, rack gear, belt, and pulleys.
Secure long hair, loose clothing, and jewelry before
working near the treadmill, particularly near walking
surface and rotating parts.
Before running the treadmill, check for worn parts which
could break loose during service or operation.
Keep fingers away from rotating parts.
To avoid eye contaminants, clean away dust and debris
from moving parts before servicing.
Beware of sharp edges when replacing worn parts.
Do not start the walking belt when someone is on the
treadmill.
Improper lifting can cause back strain. It also can cause
injury to others if the treadmill is dropped. Lifting the
treadmill requires at least two people.
When removing the grade motor and chain, block the
treadmill headframe so that the deck will not drop to the
floor, causing injury and damage.
Tools
• Phillips and flat blade screwdrivers
• Hex wrenches: 5/32 in., 9/16 in., 7/16 in., 1/2 in., 5/16 in.
• 11/32 in. nut driver
• Heyco® strain relief pliers for replacing power cord (low voltage
units only)
• 1/2 in. crowfoot open-end wrench for removing drive motor
• Torque wrench for rack gear replacement, 46± 4ft-lbs
• Frequency counter
• Tachometer
• Wooden blocks
• Belt-tension calipers (optional) P/N 030113-001
• Masking tape or heavy pencil
♦
Although some procedures are used for several applications (removing the
hood, for example), each procedure is explained only once. Reference
procedures under their headings for subsequent applications.
♦
All references to front, rear, left, and right are given as though you were
facing the front handrail while walking on the deck.