Toro Multi Pro 1200 - Page 117

Multi Pro 1200/1250 Page 6 -- 17 Spray System
Disassembly (Fig. 11)
IMPORTANT: Make sure to remove and neutralize
chemicals from pump before disassembly. Wear
protective clothing, chemical resistant gloves and
eye protection during pump repair.
1. Remove two (2) hex bolts that retain valve c hamber
to pump. Separate valve chamber from pump.
2. Remove inlet and outlet valves and O--rings from
each diaphragm cover. Note orientation of valves. Dis-
cardvalvesandO--rings. CleanvalveandO--ring seats
in the valve chambers and diaphragm covers.
3. Remove hex bolts that secure diaphragm covers to
pump. Remove diaphragm covers.
4. Remove hex bolt, washer, nylon washer,diaphragm
and diaphragm back disc from each connecting rod.
Discard diaphragms.
5. Removefive(5)hexboltsandnutsthatsecurepump
casing halves together. Note location of two (2) longer
hex bolts. Carefully separate pump casing halves.
6. Cleangreasefrombottomofhousingandcheckcon-
dition of bearings on crankshaft. If bearings require re-
placement, remove and disassemble crankshaft:
A. Removecrankshaftassemblyfrompumpcasing.
B. Slide felt seal and dust plate from both ends of
crankshaft.
C. Loosen bolt and hex nut that secure connecting
rodstocrankshaft.Slideconnectingrodsfromcrank-
shaft.
D. Press ball bearings from crankshaft.
Assembly (Fig. 11)
1. If crankshaft was disassembled, reassemble crank-
shaft:
A. Handpacknewbearingswith#2generalpurpose
lithium base grease.
B. Pressing on bearing inner race, install two con-
necting rod and two crankshaft ball bearings onto
crankshaft.
C. Slide connecting rods onto rod bearings. Offsets
oftheconnectingrodsshouldfaceeachother.Install
hex bolt,flatwashersandhexnutto connecting rod.
Torque hex nuts to 25 ft--lb (34 N--m) tosecurecon-
necting rod to crankshaft.
D. Position dust plate and felt seal on both ends of
crankshaft.
IMPORTANT: If connecting rodposition is incor-
rect, pump will not operate properly.
E. Slidecrankshaftassemblyintopumpcasing.The
rear connecting rod should be positioned to the left
sideandtheconnectingrodclosesttoyoutotheright
side (Fig. 12).
2. Place second pump casing onto assembly. Pump
casing surfaces should mate together.
3. Install three (3) shorter (30 mm) and two (2) longer
(55 mm) bolts into pump casing assembly (Fig. 13).
Thread hex nuts onto bolts but do not fully tighten.
Check that crankshaft turns freely.
1. Closest connecting rod (to right side)
2. Rear connecting rod (to left side)
Figure 12
2
1
1. Hex bolt (30 mm long) 2. Hex bolt (55 mm long)
Figure 13
2
1
1
1
2
Spray
System