MAINTENANCE
7-48
7. When connecting hydraulic hoses and pipes, take
special care to keep seal surfaces free from dirt and
to avoid damaging them. Keep these precautions in
mind:
a. Wash hoses, pipes, and the tank interior with a
washing liquid and thoroughly wipe it out before
reconnecting them.
b. Only use O-rings that are free of damage or
defects. Be careful not to damage them during
reassembly.
c. Do not allow high pressure hoses to twist when
connecting them. The life of twisted hoses will be
shortened considerably.
d. When connecting screw type joints, apply seal
tape to the threads of male screw. Be sure to
leave a couple of threads at the male screw top
unwrapped, as shown. Do not overwrap. Apply
seal tape around threads as shown, so that the
tape does not loosen when the female screw is
tightened.
e. Carefully tighten low pressure hose clamps to
following torque specifications. Do not
overtighten.
T Bolt Clamp:
4.4 N
x
m (0.45 kgf
x
m, 3.3 lbf
x
ft)
Jubilee Clamp:
5.9 to 6.9 N
x
m
(0.6 to 0.7 kgf
x
m, 4.3 to 5.1 lbf
x
ft)
f.
Carefully tighten nut for bandy pipe to following
torque specifications on the right side. Do not
overtighten.
8. When adding hydraulic oil, always use the same
brand of oil; do not mix brands of oil. As the machine
is filled with Super EX 46HN when it is shipped from
the factory, use it as a general rule. When selecting to
use another brand of oil listed in the table “Brand
Names of Recommended Hydraulic Oil”, be sure to
completely replace the oil in the system.
9. Do not use hydraulic oils other than those listed in the
table “Brand Names of Recommended Hydraulic Oil”.
10. Only 50 to 60% of the total hydraulic circuit oil on a
large size excavator can be replaced at a time.
Accordingly, conduct minimum flushing twice.
11. If any other hydraulic oil (having a different
replacement interval) is unavoidably used, replace
the oil in accordance with the individual replacement
interval standard.
12. In case the machine is used for dredging operations,
replace the hydraulic oil at a 2000 hour interval
regardless of the oil brand used.
13. Never run the engine without oil in the hy-draulic oil
tank.
M114-07-041
M114-07-042
M114-07-043
Pipe Dia. (A)
φ
8
φ
10
Width across flat (B) (mm)
17
19
N
x
m
34
40
kgf
x
m
3.5
5
Fastening Torque
lbf
x
ft
25.5
36
M117-07-149
Jubilee Clamp
T Bolt Clamp
Direction of
Tape Winding
A couple of threads left unwrapped
Содержание EX1900-5
Страница 1: ......
Страница 37: ...SAFETY SIGNS S 29 SS 411 SS 691 SS 442 M18C 01 006 SS 445 M144 07 107 ...
Страница 38: ...SAFETY SIGNS S 30 SS 446 SS 723 SS3076117 SS 723 SS 410 SS 723 Loading Shovel ...
Страница 39: ...SAFETY SIGNS S 31 SS3091476 M146 01 035 ...
Страница 40: ...SAFETY SIGNS S 32 SS 413 M18C 01 007 M18C 01 008 ...
Страница 42: ...SAFETY SIGNS S 34 MEMO ...
Страница 112: ...DRIVING THE MACHINE 4 12 MEMO ...
Страница 140: ...MAINTENANCE 7 8 MEMO ...
Страница 146: ...MAINTENANCE 7 14 Hoses Q ty in Use Transmission Oil Cooler Hose 5 2 M18C 07 062 5 ...
Страница 156: ...MAINTENANCE 7 24 4 Grouped Grease Fittings 7 Arm Ñ Lubrication M144 07 079 M144 07 005 7 ...
Страница 158: ...MAINTENANCE 7 26 Grease Fittings for Bucket and Link Pins Auto lubrication system equipped M18C 07 072 VIEW B VIEW A ...
Страница 258: ...MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS 9 2 MEMO ...
Страница 274: ...TROUBLESHOOTING 11 14 MEMO ...
Страница 278: ...SPECIFICATIONS 12 4 MEMO ...