Bosch Rexroth A4VG 40 Series - Activating and Deactivating the Bypass Function

About this product 23/68
RE 92004-01-B/05.2017, A4VG Series 40, Bosch Rexroth AG
5.3.1 Activating and deactivating the bypass function
1
2
1
2
Fig. 3: Activating the bypass function
To activate the bypass function:
1. Switch off the combustion engine.
2. Use a hexagon socket wrench (WAF 8) to turn the shuttle valve (1) counter-
clockwise to the stop (2). The bypass function is now active.
The maximum towing speed is dependent 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.
The vehicle may only be towed out of the immediate danger zone.
CAUTION! Impermissible heat generation and inadequate lubrication!
Risk of burning or property damage! High towing speeds and long towing distances
result in impermissible heat generation and inadequate lubrication. This overheats
and damages the axial piston unit.
▶ Wear heat-resistant protective clothing, for example, gloves.
▶ Only tow the vehicle out of the immediate danger zone.
NOTICE! Draining the hydraulic circuit!
Risk of damage! While towing with the bypass function activated, the closed
hydraulic circuit drains itself. This can result in unintended functions when restarting
the travel drive.
▶ Start the travel drive only after completely filling and air bleeding the hydraulic
circuit (see chapter 8.1 “Initial commissioning” on page 46).
To deactivate the bypass function:
1. Immediately after towing, switch off the bypass function.
2. Use a hexagon socket wrench (WAF 8) to turn the shuttle valve (1) clockwise to
the stop and tighten it with a tightening torque of 50Nm.
The bypass function is no longer active.
Activating the bypass
function
Towing speed
Towing distance
Deactivating the bypass
function