Service Manual

12
BDP-10A/16A/21L
Note: Raising the system oil temperature will make a difference in the readings you receive. It has been
determined that to complete this test accurately, the oil temperature must be near system operating temperatures.
Suggested temperature range 160°- 210°F (71.1° - 98.9°C)
8. On the BDP-10A/10L, BDP-16A and BDP-21L tighten the restriction valve until you read 300 psi (21 bar).
Record the flow reading from the Bi-Directional Flow Meter.
9. Increase the pressure to 1100 PSI (76 bar) for all models (BDP-10A/10L, BDP-16A and BDP -21L).
Record the flow reading from the Bi-Directional Flow Meter.
10. The acceptable gpm “flow droop” or (difference) is:
BDP-10A/10L 1.5 gpm (5.6 l/min)
BDP-16A 2.0 gpm (7.6 l/min)
BDP-21L 2.0 gpm (7.6 l/min)
If the difference exceeds these values the pump would not be acceptable.
TEST EXAMPLE: BDP-10A/10L
300 psi (21 bar) reading 7 gpm (26 l/min) (1st reading)
1100 psi (76 bar) reading 3 gpm (11 l/min) (2nd reading)
(BDP-10A/10L)
300 psi (21 bar) reading 7 gpm (26 l/min) (1st reading)
1100 psi (76 bar) reading 3 gpm (11 l/min) (2nd reading)
4 gpm (15 l/min) (the difference)
Subtract the 1st reading from the 2nd.
(In this example, 4 gpm difference would
indicate a defective pump).
FROM WHEEL MOTOR
CONNECTIONS TO
THE FWD./RVS. LINES
DISCONNECTED
BI-DIRECTIONAL
FLOWMETER
RESTRICTION
VALVE
FROM WHEEL MOTOR
DISCONNECTED
THE FWD./RVS. LINES
CONNECTIONS TO
FLOWMETER
BI-DIRECTIONAL
VALVE
RESTRICTION