JLG M450 Parts Manual - Manual (Page 249)

SECTION 6 - CYLINDER
3121649 E450A/E450AJ/M450AJ 249
FIGURE 6-15. COUNTERBALANCE VALVE ASSEMBLY
ITEM PART NUMBER QTY DESCRIPTION REV
4640807 Ref COUNTERBALANCE VALVE ASSEMBLY D
1 4640771 1 Cartridge, Counterbalance
1 2900770 1 Seal Kit - 4640771 Cartridge
2 4640709 1 Cartridge, Vented Counterbalance
2 2900770 1 Seal Kit - 4640709 Cartridge
3 3790113 2 O-Ring (Between Valve and Cylinder Block)