Case 750L, Руководство по ремонту

Страница: 38 / 51

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
37. Completely retract the cylinders of all attachments on
the machine. Angle the blade to the right, the right
cylinder will be fully retracted and the left will be fully
extended. Stop the engine.
WARNING
If retracting the cylinder rods causes the attachment
to be raised, block the attachment in place before pro­
ceeding to the next step. 39-4
38. Move each control lever in both directions to release
pressure in the hydraulic circuits.
39. Loosen and remove the filler cap from the reservoir.
40. Drain the hydraulic oil from the reservoir.
(A) The reservoir holds approximately 20 U.S. gal­
lons (75.7 liters) of hydraulic oil.
(B) Have available acceptable equipment to drain
the hydraulic oil.
(C) Remove the drain plug from the bottom of the
reservoir.
41. Remove the hydraulic and hydrostatic filter elements
from the machine.
42. Install new hydraulic and hydrostatic filter elements
on the machine.
43. Install the drain plug in the bottom of the reservoir.
44. Fill the hydraulic reservoir with lubricant, refer to
PRI­
MARY HYDRAULIC POWER SYSTEM - General
specification (A.10.A) and PRIMARY HYDRAULIC
POWER SYSTEM - Capacity (A.1 0.A) for proper
quantities and type.
45. Disconnect the line from the OPEN end and
CLOSED end of each cylinder.
46. Be sure all control levers are in the NEUTRAL posi-
tion.
47. Start and run the engine at low idle.
IMPORTANT: Check the oil level in the hydraulic reservoir
frequently while doing step 48. Have another person hold
a container under the hydraulic lines while you do step 48.
48. Slowly move each control lever in both directions un­
til oil begins to flow from the open line. Hold the con­
trol lever in place until clean oil flows from the open
line.
49. Stop the engine.
50. Connect the system line to the CLOSED end of each
cylinder.
51. Connect a suitable drain line to the OPEN end of
each cylinder and place the other end in an accept­
able container for contaminated oil.
52. Start the engine and run the engine at low idle.
87728445 1 2/28/2008
A.10.A / 18