Manitowoc National Crane NBT30H-2 Service Manual

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National Crane 03-20-19 Control # 613-06 5-5
NBT30H-2 SERVICE MANUAL HOIST
18. Coat the new O-ring with light oil and install into the
groove on the brake cover (20).
19. Install the cover (20) onto the brake housing (21) and
tighten it evenly, alternating between opposite
capscrews. Make sure that the cover is aligned properly
with the brake housing to orient the motor and vent as
they should be.
20. Check the brake release with a portable hydraulic pump.
Full release should be obtained at 250 psi ± 20 psi (1724
kPa ± 138 kPa). Also, check the brake for proper
operation by applying 155 psi (1069 kPa) to the brake
port and adapting a torque wrench to the input shaft. The
torque in the hoist-down, or payout, direction should be
95 to 115 lb-ft (120 to 156 Nm).

Manitowoc National Crane NBT30H-2 Specifications

General

Brand	Manitowoc
Model	National Crane NBT30H-2
Category	Construction Equipment
Language	English