Manitowoc National Crane 800D User Manual

REPAIR 800D
6-4
Published 5-27-2018 Control # 039-06
THREE SECTION BOOM OPERATION
The boom service and maintenance section of this manual includes both the three and four section boom information. Use
appropriate information for your particular boom length.
A rod-fed, double-acting cylinder, attached to the 1st and 2nd
boom sections, supports and propels the 2nd boom section.
The extend cables attach to the base end of the 1st boom
section, are reeved around sheaves attached to the cylinder,
and attach to the base end of the 3rd boom section, therefore
providing support and extension of the 3rd boom section.
The retract cables attach to the tip end of the 1st boom
section, are reeved around sheaves attached to the 2nd
boom section, and attach to the base end of the 3rd boom
section, therefore providing retraction of the 3rd boom
section. This type of boom operation provides that the 2nd
and 3rd section booms extend and retract equally. Proper
service and maintenance is required to insure smooth and
proper operation.
BOOM ILLUSTRATIONS
Boom Extended
Boom Retracted
BASE
EXTEND CABLE
TIP
1ST SECTION 2ND SECTION
3RD SECTION
RETRACT CABLE
9397
EXTEND CABLE
RETRACT CABLE
EXTEND CABLE ADJUSTMENT
RETRACT CABLE ADJUSTMENT
9398
EXTEND CABLE
RETRACT CABLE
9399
Fo
r
Reference
Only

Manitowoc National Crane 800D Specifications

General

Brand	Manitowoc
Model	National Crane 800D
Category	Construction Equipment
Language	English