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MAINTENANCE
High-Strength Bolt Connections (continued)
Check fastening and condition of main hydraulic pumps (1-6),
illust. Z 20710.
Mounting bolt size: M20, Grade 8.8, tightening torque
360 Nm.
Check fastening and condition of auxiliary pumps (8.1 - 8.6)
and secondary hydraulic pumps (10.1 - 10.4).
Mounting bolt size: M12, Grade 8.8, tightening torque 74 Nm.
Pump Description:
(1-6)
Main hydraulic pumps, swash plate type for all work-
ing and travelling motions.
(8.1-
Gear type pumps.
8.6)
(10.1-
Axial piston pumps.
10.4)
4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH
407
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