Hydraulic boom control valve assembly (2-spool) – Lull 644B Parts Manual User Manual
Page 451

ITEM
PART NO.
DESCRIPTION
QTY.
ITEM
PART NO.
DESCRIPTION
QTY.
1
P28492
1
Control Valve Assembly
2
P91768
4
Nut, Special
3
P91771
2
Tie Rod, 7/16"-20
4
P91767
2
Nut, Special
5
P91770
1
Tie Rod, 1/2"-20
6
P32677
1
Housing, Outlet Section
7
P91783
2
Spring
8
P91784
2
Poppet
9
P91782
2
O-Ring
10
N.S.S.
2
Housing, spool
11
N.S.S.
2
Spool
12
P91781
4
O-Ring
13
P32931
2
O-Ring
14
P32930
2
Retainer, spool
15
P91776
4
Washer
16
P91778
2
Spacer
17
P91777
2
Spring
18
P21701
2
Shoulder Bolt, Socket Hd., 1/2" Dia. × 2"
19
P32929
2
Cap, Spool
20
P32927
4
Retainer
21
P01766
4
Capscrew, Socket Hd., 1/4"-20 × 4 1/2"
22
P32928
2
Cap, Spool
23
P01755
4
Capscrew, Socket Hd., 1/4"-20 × 1"
24
P91786
1
Plug
25
P91787
1
O-Ring
26
P91790
1
Relief Valve Assembly
(See Page 6.6.1 for Breakdown)
27
P91788
1
Housing, Inlet Section (Includes Item 28)
28
P91782
1
O-Ring
REF
P31590
1
Seal Kit (Includes Items 9, 12, 13, 25, 28, and
P91808; Seal and Spring Kit for Relief Valve)
N.S.S. = Not Sold Separately
1044C-42 S/N 101–116
1044C-54 S/N 101–154
644B-42 S/N 101–207
644B-37 S/N 101–590, 592–666
844C-42 S/N 101–621
10K-42 S/N 101–106
10K-54 S/N 101–103
8K-42 S/N 101–220
6K-42 S/N 101–119
6K-37 S/N 101–317
Rev. 001
644B
6K
844C
8K
1044C
10K
▼
HYDRAULIC BOOM CONTROL VALVE ASSEMBLY (2-Spool)
6.5.1