ARO ARO PH10A-BSS-SST Instrukcja obsługi - Strona 7
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PARTS LIST / PH10A-XXX-XXX AIR MOTOR SECTION
IMPORTANT
BE CERTAIN TO ORIENT (115) SPACER LEGS
AWAY FROM BLOCKING INTERNAL PORTS
WHEN REASSEMBLING AIR SECTION.
114
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113
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112
123
174
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173
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169
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121
118
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172
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PILOT
VALVE
136
MAJOR VALVE DISASSEMBLY
1. Remove the two (124) tie rods blocking the (136) plugs.
2. Using a 3/8" Allen wrench, remove both (136) plugs. Check the
(137) "O" rings and make certain they are intact and undamaged.
Fragments of "O" rings can cause the pump to malfunction.
3. From the air inlet side (use a large dowel and soft mallet) tap moder-
ately on the (109) piston and then push the entire valve stack out the
opposite side. Clean and inspect all parts for damage and wear.
MAJOR VALVE REASSEMBLY
Lubricate all soft parts, spool, and bores with Key-Lube grease upon
S
reassembly.
1. For best results, rebuild the Major Valve stack one piece at a time.
Start with the (112) washer and install it in the side opposite the air
inlet. Place the washer into the bore with the raised edge facing out-
PH10A-XXX-XXX (en)
MAJOR VALVE
See cross section detail figure 4.
115
201
126
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104
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110
137
109
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136
137
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111
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116
127
101
118
126
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ward, follow it with the larger (114) "O" ring.
2. Place (113) "O" ring on the (115) spacer, insert the spacer with the
legs facing outward, be sure not to block the internal ports with the
spacer legs. Repeat this process three times and make certain each
set is pressed in well.
3. Install the last (112) washer and a (114) "O" ring, place the last (113)
"O" ring on the (116) spacer and install. Install the last (114) "O" ring.
4. Lubricate the (111) spool and install (this is the side opposite of the
air inlet). Note: The end with the hole in it faces outward.
5. Install a new (137) "O" ring on the (136) plug and thread it into the
(101 motor center body.
Note: Align plug carefully and take care not to damage "O" rings.
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6. Assemble the (110) "U" cup to the (109) piston and install it into the
air inlet side with the lips facing outward.
7. Install new (137) "O" ring on the (136) plug and install into the (101)
motor center body.
8. Assemble (124) tie rods, securing with (29) nuts. NOTE: Torque (29)
nuts to 280 - 300 in. lbs (31.6 - 33.9 Nm).
LUBRICATION / SEALANTS
Apply Key-Lube grease (93706-1)
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to all "O" rings, "U" Cups & mat-
ing parts.
Apply Loctite 271 to threads.
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Apply Loctite 572 to threads.
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Refer to steps 1 and 2 of "Pilot
m
Valve Reassembly".
MAJOR VALVE
CROSS SECTION DETAIL
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109
111
112
110
114
Figure 4
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103
102
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173
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121
174
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115
116
113
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123
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Figure 3
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