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About this product
Bosch Rexroth AG, A4VG Series 35, RE 92035-01-B/2019-11-25
5.3 Bypass function
For vehicles with hydrostatic travel drive, as long as there is no downstream
mechanical interruption of the drive train (switch to idle/freewheeling), the flow can
be altered using a bypass circuit in order to tow the vehicle out of the immediate
danger zone. Turning the corresponding screw allows the hydraulic fluid to flow
freely.
If necessary, Bosch Rexroth recommends always activating the bypass function
on both pressure relief valves (avoiding a function in only one travel direction).
The bypass function must be deactivated again before restarting the machine.
5.3.1 Activating and deactivating the bypass function
2
1
1
2
2
1
Fig. 3: Activating the bypass function
To activate the bypass function:
1.
Switch off the combustion engine.
2.
Loosen the lock nut (
2
) by turning it counterclockwise one half-turn with an
external hexagon wrench (WAF 13).
3.
Use a hexagon socket wrench (WAF 4) to turn the screw (
1
) clockwise until the
screw (
1
) is against the spring seat. This is indicated by the increased resistance.
Then turn the screw (
1
) one half-turn into the spring seat.
4.
Tighten the lock nut (
2
) clockwise to a torque of 22 Nm.
The maximum towing speed depends on the gear ratio in the vehicle and must be
calculated by the vehicle manufacturer. The corresponding flow of
q
V
= 30 l/min
may not be exceeded.
Activating the
bypass function
Towing speed
