HYDRAULIC SYSTEM NBT40 SERVICE MANUAL
2-16 Published 8-01-2017 Control # 287-11
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.
Element Removal
1. Shut down the hydraulic system.
2. Wipe any dirt from the filter head and cap assembly.
3. Loosen the six bolts securing the filter cap to the filter
head.
4. Twist to unlock and remove the filter cap.
5. Remove the filter element from the filter bowl (housing).
6. Ensure the new filter element is correct by comparing
their part numbers with the part numbers of the used
filter element.
7. Discard the used filter element.
Element Installation
1. Install the new element into the filter bowl (housing).
2. Install the filter cap and twist to lock in place.
3. Tighten the six bolts to secure the filter cap.
4. Activate the hydraulic system and check for leaks. Make
repairs as needed.
1
5
4
6
7
9
10
8
FIGURE 2-10
2
3
9 Filter Cap
10 Capscrews (6)
11 Magnetic Drain Plug
12 Breather
13 Pump Load Sense Drain
14 Swivel Drain
15 Outrigger Drain
16 Suction to Pump
Item Component
Item Component
1 Hydraulic Reservoir
2 Temperature Gauge
3 Hydraulic Oil Level Gauge
4 Access Cover
5 Fill Cap
6Bowl
7 Filter Element Gauge
8Filter
11
13
14
15
16
Return
DANGER
Ensure that hydraulic system is shut down and the
pressure is relieved.
Reference Only
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