Service Manual

10
BDP-10A/16A/21L
WARNING
Do not attempt any servicing or adjust-
ments with the engine running.
Use extreme caution while inspecting the
drive belt assembly and all vehicle link-
age!
Follow all safety procedures outlined in
the vehicle owner’s manual!
SECTION 3. TROUBLESHOOTING
In many cases problems with the BDP-10A, 16A
and 21L are not related to a defective pump but
are caused by slipping drive belts, partially en-
gaged bypass valves, and loose or damaged
control linkages. Be sure to perform all opera-
tional checks and adjustments outlined in Sec-
tion 3. before assuming the pump is malfunction-
ing. Table 2. below provides a troubleshooting
check list to help determine the cause of opera-
tional problems.
Table 2. BDP 10A, 16A and 21L Troubleshooting Checklist
Possible Cause Corrective Action
VEHICLE DOES NOT DRIVE/TRACK STRAIGHT
UNIT IS NOISY
UNIT HAS NO/ LOW POWER
UNIT OPERATING HOT
BDP LEAKS OIL
Vehicle tires improperly inflated Refer to vehicle manufacturer suggested pressure
Control linkage bent, loose or out of adjustment Repair, adjust or replace vehicle linkage
Bypass loose Tighten bypass per page 11
Inlet leak Check all externals to BDP inlet
Excessive input speed Adjust input speed above 1800 rpm and below 3600 rpm
Oil level low or contaminated oil Fill to proper level or change oil
Excessive loading Reduce vehicle load
Air trapped in hydraulic system Purge hydraulic system per page 12
Bypass loose Tighten bypass per page 11
Inlet leak, line or filter partially blocked or damaged Check all externals to BDP inlet
Engine speed low Adjust to correct setting
Control linkage bent, loose or out of adjustment Repair or replace vehicle linkage
Drive belt slipping or pulley damaged Repair or replace drive belt or pulley
Oil level low or contaminated oil Fill to proper level or change oil per page 11
Excessive loading Reduce vehicle load
Bypass loose Tighten bypass per page 11
Air trapped in hydraulic system Purge hydraulic system per page 12
Inlet leak Check all externals to BDP inlet
Inlet filter clogged Replace filter per page 12
Suspected internal damage Check per page 9
Debris buildup Remove debris
Cooling fan or heat exchanger damaged Repair or replace cooling fan or heat exchanger
Oil level low or contaminated oil Fill to proper level or change oil per page 11
Excessive loading Reduce vehicle load
Air trapped in hydraulic system Purge hydraulic system per page 12
Inlet leak Check all externals to BDP inlet
Damaged seals or gaskets Remove debris, replace seals
Air trapped in hydraulic system Purge hydraulic system per page 12