TM 5-3810-307-24-1-2
8.1.2
Checking for External Leaks
a.
Check whether all screw connections, locks and lines of steering system, as well as the sealing
rings on steering gear and pump are free of leaks. Tighten screw connections if required and
replace damaged sealing rings. When installing new sealing rings, we recommend our special
tools to protect sealing rings.
b.
Check all hoses and lines for any signs of chaffing. Replace damaged parts. Use only the
manufacturer's approved and pressure tested spare parts to replace hoses with visible external
damage such as cracks.
8.1.3
Filter Change
a.
Remove cover of single or multi-chamber oil tank (oil reservoir).
b.
Pull out used up filter cartridges at metal collar. When pulling out, keep bore or filter cartridges
closed so that the contaminated oil is not flowing back into tank.
c.
Insert new filter cartridges with metal collar in upper direction.
Hydraulic Steering Tester Connected into Steering Circuit
Steering systems in which the pressure limiting valve is located in steering or separately in
line between tester and steering - The pressure limiting valve can therefore no longer reduce the
oil pressure, since the pressure line is locked by the shutoff valve.
Testing Hydraulic Function of Steering and Engine-driven Pump
For testing of steering circuit I (engine-driven and drive-dependent pump) refer to Para. 8.1.6.
8.1.5.1
Checking V-Belt Tension
Check tension of V-belt by means of conventional thumb test. (V-belts should not slip even under
maximum pressure). Replace defective V-belts.
WARNING
Pressurized tools may be ejected - avoid close contact on eye level.
In any case, if the tool is held under steering lock conditions, take care
that sufficient free space is provided between wheel and frame. For
instance, the operator's hand may get squeezed by a jerk of the wheel
while the tool is being pressed out! According to the axle type, use a
thrust piece, specifically designed for this purpose by the vehicle
manufacturer (e.g. inset to Figure 6).
8.1.5.2
For Steering Systems According to Para 8.1.4:
At idle speed of engine and while watching pressure gauge, slowly close installed shutoff valve until
the specified maximum pressure is attained. Then be sure to keep shutoff valve still further closed
to prevent unchecked increase above permissible maximum pressure. Let maximum pressure
act only for a short period, max. five seconds, since otherwise the interior parts of the
pumps will be excessively heated which in turn may lead to early wear.
H-26 Change-1
