The model code on the serial plate gives the factory setting of the PL (Pressure Limiter). The PL setting
is referenced to charge pressure. Subtract charge pressure from system pressure gauge readings to
compute the effective PL setting.
6. Repeat steps four and five until you reach the desired PL setting. After adjustment, torque the locknut
(L024). Do not over torque.
7. Shut down the prime mover. Remove gauges and replace plugs.
Pressure limiter settings
Pressure limiter setting HPRV setting
150 200
180 230
200 250
230 280
250 300
280 330
300 350
330 380
350 400
380 420
Pressure limiter setting HPRV setting
400 450
410
420
430 480
440
450
460 510
470
480
Engaging the Bypass Function (060/068 only)
Use this procedure to bypass the pump to allow moving the vehicle/machine short distances when you
cannot start the prime mover.
Caution
It is possible to damage the drive motor(s) by operating in bypass mode without charge pressure. Move
the vehicle/machine at a speed not more than 20% of maximum for a duration not exceeding 3 minutes.
1. To open the HPRVs (A and B), rotate three revolutions counter clockwise using a 22mm hex wrench.
Do not rotate more than 3 revolutions, leakage will result.
2. To close the HPRVs, rotate them clockwise until seated. Torque to 70 N•m [52 lbf•lb].
Service Manual
H1 45/53/60/68 Tandem Closed Circuit Axial Piston Pumps
Adjustments
38 |
©
Danfoss | June 2018 520L0928 | AX00000103en-US0303
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