Manitowoc 18000, Руководство по техническому обслуживанию, Страница: 104 / 316

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HYDRAULIC SYSTEM 18000 SERIVCE/MAINTENANCE MANUAL
2-10
Published 12-05-17, Control # 035-23
9. If required on current production cranes, replace
desiccant breather (1,
Figure 2-5 ).
10. On past production cranes, either replace breather
assembly (1,
Figure 2-7 ) with a new one or replace
breather element as follows, depending on which is
more economical for you:
a. Remove breather assembly (1) from tank.
Use care not to lose parts inside breather when
cover is removed.
b. Remove three screws (4) securing cover (5) to base
(3).
c. Separate cover from base.
d. Remove and discard old element (6).
e. Install new element.
f. Reassemble breather assembly (1) as shown in
Figure 2-7 .
g. Fasten breather assembly to tank.
11. Replace all filter elements (2 and 7, Figure 2-2 ).
12. Fully close drain valve (14) and remove rubber hose.
13. Remove vent plug (1) from both charge filters (2) on
cranes prior to s/n 18001082.
NOTE: S/N18001082 and newer - Supercharge pump and
charge filters 1 and 2 replaced with accessory
pump and additional return filter.
14. Remove vent cap (4) from end of both charge pressure
manifolds (3).
NOTE: S/N18001082 and newer - Supercharge pump and
charge filters 1 and 2 replaced with accessory
pump and additional return filter.
15. Remove vent cap (4) from both sides of thermal bypass
valve (5).
16. Fill hydraulic tank to FULL COLD level on sight gauge
(12) with clean hydraulic oil (see F2104 at end of Section
9 in this manual for hydraulic oil specifications).
Fill tank through fill port (8a) or through power fill coupler
(8b).
17. Apply 3-5 psi owner supplied air pressure to coupler
(13a) or air valve (13b) in side of hydraulic tank. Some
air will leak from breather cap.
18. Observe vent ports:
a. Securely install vent plug (1) when oil starts flowing
from vent port in each charge filter (2) on cranes
prior to s/n 18001082.
NOTE: S/N18001082 and newer - Supercharge pump and
charge filters 1 and 2 replaced with accessory
pump and additional return filter.
b. Securely install vent caps (4) when oil starts flowing
from vent port in each charge pressure manifold (3)
and from cooler lines at thermal bypass valve (5).
19. Disconnect air supply.
20. Check tank level and refill as required.
21. Start engine and allow hydraulic system to return to
normal operating pressure and temperature. Check for
leaks and tighten parts as required.
22. Stop engine, check tank level, and refill as required.
NOTE: If the hydraulic system was extremely dirty (gum or
lacquer formation on parts indicated by erratic,
jerky, or sluggish operation) repeat Changing Oil
procedure after 48 hours of operation.
SERVICING PUMPS
It is not necessary to drain the hydraulic tank when servicing
the hydraulic pumps. To service the pumps, close shut-off
valves (15,
Figure 2-2 ) in the pump suction lines.
Open the valves prior to starting the engine after servicing
the pumps.
1
FIGURE 2-7
Item Description
1 Breather Assembly
2 Relief Valve
3 Base
4 Screw
5 Cover
6 Element
7 Spring
2
3
4
5
6
7
18CSM2-105
Past Production
CAUTION
Avoid Damage to Pumps!
Open hydraulic tank shut-off valves before starting
engine. Failing to perform this step will result in damage to
pumps from cavitation.