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CHECKOUT, CALIBRATION AND MAINTENANCE
gENERAL
This book incorporates all motorized “y2Kb/c” balancers manufactured in Conway Arkansas. The test codes
for each digital display balancer are alike, and so are the results. The JBC balancer uses “F” to begin any
service procedure, the Snapon balancer begins all service procedures with a “P” code. All “
F/p
” codes run
parrallel. If a service routine is not available for any particular balancer the result will be displayed as “NOt
uSE”.
sHAFT IMBALANCE, WHEEL ADApTER TO sHAFT REMOUNT TEsT
This test proves the wheel balancer centering device is balanced, turns true and proves the centering device
inside taper and balancer shaft outside taper (mating surfaces) are true.
1. mount a medium size wheel assembly (14”), input the rim dimensions and balance the wheel assembly to
0.00 ounces imbalance in both planes. This must be fine balanced to exactly 0.05 in both planes.
2. Spin the balancer several times. verify that no more than 0.05 oz. imbalance is displayed.
3. Loosen the Speed nut and rotate the tire and wheel assembly 180 degrees, making sure the cone does
not rotate. NOTE: DO NOT REmOvE THE WHEEL ASSEmBLy.
4. Operate the balancer. The new imbalance displayed should not exceed 0.25 oz.
TEsT pRODUCEs READINgs OUT OF TOLERANCE:
5. Remove the tire and wheel assembly from the balancer.
6. Check the tapered surfaces of the basic centering device and balancer shaft. They should be clean and
smooth. Clean and retest. Check all mounting accessories cones, wingnut etc. making sure each fit on
the shaft snug, there should be no play between the shaft and mounting accessories.
7. If the test still produces unacceptable results use a dial indicator, measure runout of the balancer shaft
tapered mounting surface. Acceptable tolerance is 0.0015" T.I.R. (Total Indicated Runout). If the surface
measures out of tolerance, replace the vibratory system.
8. Perform a
F/p
80,
F/p
83,
F/p
84 and a
F/p
88 and retest. These test can be found later in this Chapter.
NOTE: A FINE BALANCED TIRE AND WHEEL ASSEMBLY ALONG WITH A 3.5 OUNCE WEIGHT
CAN BE SUBSTITUTED.
BALANCER DIAgNOsTICs (TROUBLEsHOOTINg)
many problems may be found by process of elimination. By determining the problem, then eliminating po
-
tential problem areas starting with the most-likely to fail items, solutions to problems may be rapidly found.
The y2k balancer is composed of subsystems, each requiring several inputs for proper function. With proper
inputs the subsystem performs as expected and produces an output. Every piece of equipment, when oper
-
able, functions in a predetermined manner. Events have to take place in the proper sequence every time. A
balancer must:
Summary of Contents for EEWB304B
Page 1: ...WHEEL BALANCER Service Manual EEWB502B C EEWB503B EEWB304B ...
Page 56: ......
