Remove all jewelry such as rings, dog tags and bracelets. If jewelry contacts electrical
connection, a direct short may occur resulting in injury or death and damage to equipment.
FEET PER MINUTE (FPM) METER DOES NOT WORK (CB534C)
Wire 449-RD To Feet Per Minute (FPM) Meter Faulty.
· Wire 449 (part of instrument wiring harness) becomes wire 449-RD (part of
main wiring harness) at connector (R1/P1).
· For CB534C Roller only.
Remove two shoulder screws, washers, and vandal guard from box assembly.
Remove three screws and washers and lift box assembly up from operator station.
Set multimeter to measure VAC.
Start engine and turn vibratory system on for not more than 10 seconds.
Touch positive (+) probe of multimeter to terminal S (449-WH) of FPM meter.
Touch negative (-) probe of multimeter to good ground.
Multimeter should measure minimum of 2.4 VAC peaks.
Turn engine start switch to OFF position (TM 5-3895-379-10).
If minimum 2.4 VAC peaks are not measured at terminal S (wire 449-WH), repair or replace
wire 449-WH/449-RD and connectors from FPM meter to speed sensor (WP 0195).
If minimum 2.4 VAC peaks are present at terminal S (wire 449-WH), go to next malfunction.