GASBOY Model 4860 Meter
For old style meters only, remove cap
screw, exposing the slotted
head
calibration screw. Use a narrow blade
screw driver to turn the calibration screw
clockwise to correct for plus cubic inches
or counterclockwise for minus cubic inches
in the test measure.
Count the number of full turns and
fractional turns each time for reference in
judging the number and direction of any
additional turns required to calibrate the
meter to exact zero.
For new style meters, start with the screw turned all the way in clockwise. For gasoline
calibration, turn the screw approximately two full turns counter-clockwise. For diesel, turn the
screw approximately two additional full turns counter-clockwise.
Replace the cap screw (old style only). Deliver about 1/2 gallon through the meter before resetting
to zero and retesting. Allow a ten second drain period each time the test measure is emptied to
assure accurate measure. Adjust and retest until register is zeroed at desired flow.
SERVICE
WARNING:
To reduce the risk of electrical shock when servicing, turn off and lock out all
power to the meter/pump.
NOTE: Numbers in parentheses correspond to the numbers shown on the parts illustration and
parts list on pages 4 and 5.
To service the pushbutton register, remove two (one on each side) screws (2) from bezel (1).
Remove bezel (1), gasket (3), and dial mask (4). Reset button (5) and spring (6) are released
when dial mask is removed. Remove screws (7), reset bearing (8) and screws (11) and lift out
register assembly. Drive shaft assembly (12) may be removed by taking out four bearing screws.
Replacing Bearing and Seal Assembly (Item 16, Old Style)
To replace the shaft seal or service the gear train on back of register housing (18), remove
housing from meter body by taking out four screws. NOTE: The meter housing will be full of liquid
so some means should be available to catch what drains from the case and lines. To remove
gears (22-25), remove three retaining rings (20) and drive key (21). Withdraw the drive shaft and
gear (14), spacer (15), meter stuffing box (16), and O-ring (17). Slide new O-ring over new
bearing seal like you would slide a ring on your finger. Insert shaft (14) through spacer (15) and
bearing (16) as shown in the exploded view.
Press entire assembled shaft and seal through
housing and seat the square of the bearing firmly into the recess in the register housing (18).
Reassemble the balance of the register in reverse order of disassembly.
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