Hofmann Snap-on Y2k, Service Manual

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Definition of Terms
JBEG John Bean Equipment Group, Balancer Brand Name
Y2K Reference to the Snap-On common wheel balancer platform project
B9000 JBEG handspin wheel balancer model designation
B9450 JBEG entry level motorised (low-digital) wheel balancer model designator
B9460 JBEG motorised (high-digital) wheel balancer model designator
NORMAL A weight placement mode typically used for steel wheel rims. Two clip on
weights are attached. One on either rim flange.
ALU A weight placement mode typically used for alloy wheel rims. Two stick on
weights are attached in a variety of possible locations.
STATIC A weight placement mode typically used for motorcycle wheel rims.
HWM Hidden Weight Mode (HWM) is a special ALU mode which allows the
operator to enter the weight offsets exactly, thereby providing more
accurate ALU mode balancing.
SWM Split Weight Mode (SWM) is a special function which allows the operator to
split the weight at position 3 (see fig. 2) when using HWM 2 (a hidden
weight mode described below). This function allows the “hiding” of weights
behind wheel spokes.
Rim Data Rim data refers to the nominal wheel rim dimensions; offset, rim width and
rim diameter.
SAPE / Gauge Arm These terms refer to the arm used to automatically enter offset dimensions,
and apply weights in hwm modes.
C88 Offset This is a small offset (0 – 5 degrees) to the weight application position for
clip on weights and stick on weights in modes other than hwm, which
ensures that the weight application position is at exactly the 12 o’clock
position. This offset is produced by a service function.
Gauge arm offset This is a large offset (10 – 30 degrees for example) to the weight application
position which is used internally by the machine when stick on weights are
to be applied with the gauge arm. This offset is rim diameter dependant.