TM 5-3805-281-24-2
Hydraulic System
HYDRAULIC OIL CLEANUP PROCEDURE USING PORTABLE FILTER CADDY
33
5. Start engine and run at fast idle.
1. Install new return filter elements.
3360
19
NOTE: For a failure that creates a lot of debris,
IMPORTANT: For the most effective results,
remove access cover from hydraulic oil tank.
cleaning procedure must start with
Drain the tank. Connect filter caddy suction
the smallest capacity circuit then
line to drain port. Add a minimum of 19 L (5
proceed to the next larger capacity
gal) of oil to the tank. Operate filter caddy and
circuit.
wash out the tank.
6. Starting with smallest capacity circuit, operate each
function through a complete cycle.
IMPORTANT: The minimum ID for a connector is
1/2 in. to prevent cavitation of filter
Repeat procedure until total system capacity has
caddy pump.
circulated through filter caddy seven times. Each
function must go through a minimum of three
2. Put filter caddy suction and discharge wands into
complete cycles for a thorough cleaning of oil.
the tank filler hole so ends are as far apart as
possible to obtain a thorough cleaning of oil.
Hydraulic System Filtering--Specification
3. Start filter caddy. Check to be sure oil is flowing
Capacity ................................................... 322 L (85 gal) approximate
through filters.
Time ............................................................... 51 minutes approximate
Operate filter caddy until all oil in tank has been
NOTE: Filtering time for complete hydraulic system is
circulated through filter a minimum of four times.
0.158 minute x number of liters (0.6 minute x
number of gallons). Filtering time for machines
Hydraulic Oil Tank Filtering--Specification
with auxiliary hydraulic functions must be
increased because system capacity is larger.
Capacity ................................................... 159 L (42 gal) approximate
Time ............................................................... 14 minutes approximate
7. Stop engine. Remove filter caddy.
NOTE: Filtering time for hydraulic oil tank is 0.089
minute x number of liters (0.33 minutes x
8. Install new return filter elements.
number of gallons).
9. Check oil level in tank and add oil if necessary.
(See Hydraulic Oil in Group 0004.)
4. Leave filter caddy operating for next step.
CED,OUOE027,294
1903JUN981/1
