TM 5-3805-290-23-2
RIDE CONTROL ACCUMULATOR MAINTENANCE - CONTINUED
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TESTING AND CHARGING
WARN I N G
Injury or death can result from improper accumulator charging.
Dry nitrogen is only gas approved for use in accumulator. Charging accumulator with oxygen will cause
explosion. This danger will not occur if nitrogen cylinders with standard CGA (Compressed Gas Association,
Inc.) Number 580 connections are used.
When ordering nitrogen gas, make sure cylinders are equipped with CGA Number 580 connections. DO NOT
use color codes or other methods of identification to tell difference between nitrogen and oxygen cylinders.
Never use adapter to connect nitrogen charging group to valve outlet used on nitrogen, oxygen, or other gas
cylinders. MAKE SURE TO USE DRY NITROGEN (99.8% purity).
DO NOT disconnect or remove any hydraulic system line or fitting unless engine is shut down and hydraulic
system pressure has been relieved. Tighten all connections before applying pressure. Escaping hydraulic fluid,
under pressure, can penetrate skin, causing injury to personnel.
At operating temperature, hydraulic oil is hot. Allow hydraulic oil to cool before disconnecting any hydraulic
lines. Failure to follow this warning may result in injury to personnel.
N OT E
Ride control accumulator acts as shock absorber when machine travels over rough terrain with loaded
work tool. Force of load acts against head end of lift cylinders. Hydraulic oil from head end of lift cylinders
flows to accumulator. Flow of hydraulic oil acts against nitrogen in accumulator. Ride control accumulator
is located at left side of machine.
Testing Ride Control Valve
1.
Start engine (TM 5-3805-290-10).
2.
Place ride control switch (9) on instrument panel in OFF position (TM 5-3805-290-10).
3.
Raise work tool (TM 5-3805-290-10).
4.
Place work tool into DUMP position (TM 5-3805-
290-10).
5.
Lower work tool to ground (TM 5-3805-290-10).
6.
Apply downward pressure to work tool to lift front
wheels off ground.
7.
Lower front wheels to ground.
8.
Place ride control switch (9) in ON position (TM 5-
3805-290-10).
427-B0787
9.
Apply downward pressure to work tool (TM 5-3805-290-10).
10.
Attempt to lift front wheels off ground. Front wheels should NOT lift off ground (TM 5-3805-290-10).
11.
Raise work tool off of ground (TM 5-3805-290-10).
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