Gradall 544D (9136-4003) Service Manual - Manual (Page 95)

Figure 4-29. Model RD30A Differential Poppet Work Port Relief Valve (Adjustable).
MODEL RD30A DIFFERENTIAL POPPET WORK PORT RELIEF VALVE (ADJUSTABLE)
SEAL KIT (Contains items 4 thru 8)
NUT, Acorn, .375-24
NUT, Hex Jam, .375-24
CAP
SEAL, O-Ring
SEAL,O-RING
SEAL, O-Ring
SEAL, O-Ring
RING, Back-Up, Cut
POPPET
BODY, RD30 Relief
SPRING (500-1249 PSI [34-86 bar] crack)
SPRING (1250-1749 PSI [86-121 bar] crack)
SPRING (1750-1999 PSI [121-138 bar] crack)
SPRING (2000-2599 PSI [138-179 bar] crack)
SPRING (2600-2999 PSI [179-207 bar] crack)
SPRING (3000-3500 PSI [207-241 bar] crack)
PISTON, Relief
STEM K-7522*
3497-001
3498-001
1818-001*
2707-001*
1615 001*
6815-002*
6619-001
3936-001
12066-001
1869-001
7638-001
7078-001
1870-001
7497-001
11912-001
11481-001
3496-001 1
2
3
4
5
6
7
8
9
10
11
12
13
Item
No. Part
No.
Description
Quantity
Per Assembly
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TORQUE
RELIEF
VALVE ASSEMBLY TO
18-22 FT.-LBS.
[24-30 Nm]
4-25
*Buna-N seals are standard for all Gresen valve assemblies. For Viton seals contact the factory
Not sold seperately.
Order K-7522*