National Crane 600H, Service Manual

Page: 177 / 232

NATIONAL CRANE
08-19-2022 Control # 092-13
8-9
600H SERVICE MANUAL LUBRICATION
8
page 8-3 for recommended oil type and grade for your
application.
Swing Gearbox and Brake Oil
Check Swing Gearbox oil level
The oil in the gearbox and brake sections is recommended
to be changed after first 50 hours of operation and every
1000 hours or 6 months of usage.
1. Examine the used oil for signs of significant metal
deposits.
2. Fill the swing gearbox with the appropriate amount and
type of oil and then replace plug and vent.
See
“Lubrication” on page 8-3 of this manual.
Gearbox oil level inspection is achieved by removing the
gearbox fill/vent plug and visually inspecting the oil level.
Maximum oil level is to be 1” below the port for this gearbox
with of gear lube oil.
Gearbox lubricants are satisfactory for standard operation in
temperatures from -23° C to 82° C (-10° F to +180° F). For
operation outside this range, contact National Product
Support for recommendations.
HYDRAULIC OIL RESERVOIR LEVEL
The hydraulic oil reservoir has a sight gauge located on the
side of the reservoir. This sight gauge has a decal beside it
that indicates a “full” level and an “low oil” level. The oil
required to bring it from the “low” line to the “full” line is 5
gallons. Do not fill the reservoir above the “full” line. The oil
level should be checked with the crane parked on a level
surface in the transport condition (all cylinders retracted and
boom stowed) and the oil cold.
If the oil level is too low, add the recommended hydraulic oil
until the oil level is even with the upper mark. If the oil level is
high, drain oil until the oil level is even with the upper mark.
Hydraulic Filter Replacement
The filter is mounted in the oil reservoir, and is a replaceable
element type.
The filter must be serviced with National Crane replacement
elements at recommended intervals to assure the warranty
remains in effect. See page 2-7 for filter replacement
instructions.
WIRE ROPE LUBRICATION
A wire rope cannot be lubricated sufficiently during
manufacture to last it’s entire life. Therefore, new lubricant
must be added throughout the life of a rope to replace factory
lubricant which is used or lost. It is important that lubricant
FIGURE 8-4
1
2
3
9461
Sight Gauge
Hydraulic Oil Level
Filler Cap/Breather
FIGURE 8-5
REFERENCE ONLY