8.780-000.0 • Xpert HD-DD-PD-DA • Rev. 12/10PRESSURE WASHER SERVICE MANUAL12UU1 UNLOADER EXPLODED VIEWUU1 UNLOADER EXPLODED VIEW PARTS LISTITEM PART # DESCRIPTION KIT QTY1 8.749-792.0 Piston housing 12 Piston C 13 Piston O-ring back up A 14 8.749-796.0 Main block 15 9.152-372.0 Piston ring 16 Ball seat C 17 O-ring 10.5 ID X 1.5 CS A,C 18 Plunger B 19 9.152-016.0 Plunger housing 110 Bypass spring C 111 9.149-001.0 Low pressure port 112 9.152-017.0 Sliding connector, 30mm 18.762-005.0 Sliding connector, 40mm, long 113 9.149-002.0 Sliding connector H 1/2" 19.149-005.0 Sliding connector H 3/8" 114 9.196-011.0 Plug 5/8 -18 UNF 115 O-ring 12 ID x 2 CS A 216 O-ring 6 ID X 2 CS A 1ITEM PART # DESCRIPTION KIT QTY17 9.149-006.0 Sliding connector guide 118 O-ring backup A 16X 1.45X 1.6819 Conical seal C 120 O-ring 6.75 X 1.78 BN80 A 121 Spring seat C 122 Plunger spring B 123 8.917-699.0 Banjo bolt 1/2" short 18.917-700.0 Banjo bolt 1/2"-1/4"NPT short 18.917-698.0 Banjo bolt 3/8" short 124 8.917-698.0 Banjo bolt 3/8" short 125 9.802-893.0 Seal washer 3/8" 226 9.803-921.0 Seal washer 1/2" 29.802-893.0 Seal washer 3/8" 227 O-RING 15 ID x 2CS A,B 328 8.706-865.0 Plug, 1/4" countersunk 1Kit A 9.104-038.0 O-ring Repair KitKit B 9.104-039.0 Outlet KitKit C 9.104-040.0 Stem Repair Kit12345197891011122614152718171662021222624252523132715279.175-018.0UU1 3500PSI, UNIVERSAL UNLOADER (SPARE)2328