Lull 6K Service Manual - Manual (Page 197)

Supply, Pressure, and Return Hydraulics
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K 5-53
4. Apply type II, grade O, thread locking compound on threaded portion of
positioner screw (Item 5). Install positioner screw on spool. Torque
screw 10–12 ft-lbs.
5. Install spool assembly (Items 5 thru 11) in valve housing.
6. Install positioner housing (Item 4) on valve housing with four (4) each
socket head capscrews (Item 1), lockwashers (Item 2) and bearing
washers (Item 3). Refer to note made earlier to ensure housing is
installed in same position as when removed. Torque capscrews to
4–6 ft-lbs.
Disassembly, Load Check Assembly
Fig. 5-35: Load Check Assembly
(Ref. Fig. 5-35) The following steps are required to disassemble the load
check assembly.
1. Loosen and remove load check plug assembly from housing (Item 1).
2. Remove poppet (Item 10) and spring (Item 9) from load check plug
(Item 2).
3. Remove two (2) backup washers (Items 6 and 8) and O-ring (Item 7)
from end of load check plug.
K
1059
1
2
3
4
5
6
7
8
9
10
# Description
1 Housing
2 Load Check Plug
3 O-Ring
4 Backup Washer
5 O-Ring
# Description
6 Backup Washer
7 O-Ring
8 Backup Washer
9 Spring
10 Poppet