Univex SRM12 Quick start guide

SRM12
PLANETARY MIXER
PARTS & SERVICE MANUAL
Persons under the age of 18 are not permitted to operate or have access to this
equipment per U.S. Dept. Of Labor Employment Standards Administration Sheet No. ESA913
SRM12 REV B
SRM12 6(59,&( REV B

TABLE OF CONTENTS
DESCRIPTION PAGE
TABLE OF CONTENTS............................................................................................................I
LIST OF ILLUSTRATIONS.....................................................................................................II
1. TROUBLE SHOOTING GUIDE ...........................................................................................1.1
2. MECHANICS MAINTENANCE
BELT.................................................................................................................................2.1
MOTOR ............................................................................................................................2.2
BOWL LIFT ADJUSTMENT...........................................................................................2.2
LUBRICATION................................................................................................................2.3
REMOVAL OF TOP COVER ..........................................................................................2.4
3. TRANSMISSION
REMOVAL .......................................................................................................................3.1
TRANSMISSION PARTS LIST.......................................................................................3.2
BEATER HEAD ASSEMBLY..........................................................................................3.3
BEATER HEAD PARTS LIST .........................................................................................3.4
BEVEL GEAR DRIVE ASSEMBLY WO PTO (STD)....................................................3.5
BEVEL GEAR DRIVE ASSEMBLY WO PTO PARTS LIST.........................................3.6
POWER TAKE-OFF ASSEMBLY (OPTIONAL) ...........................................................3.7
POWER TAKE-OFF PARTS LIST ..................................................................................3.8
INPUT ASSEMBLY .........................................................................................................3.9
INPUT ASSEMBLY PARTS LIST .................................................................................3.10
VERTICAL SHAFT ASSEMBLY................................................................................. 3.11
VERTICAL SHAFT ASSEMBLY PARTS LIST............................................................3.12
REASSEMBLY 3.11
4. BOWL SUPPORT ASSEMBLY
BOWL SUPPORT REMOVAL AND DISASSEMBLY...................................................4.1
BOWL SUPPORT ASSEMBLY PARTS LIST.................................................................4.2
5. BOWL LIFT ASSEMBLY
REMOVAL AND DISASSEMBLY..................................................................................5.1
BOWL LIFT ASSEMBLY PARTS LIST..........................................................................5.2
6. SPEED CONTROL ASSEMBLY
REMOVAL AND DISASSEMBLY..................................................................................6.1
SPEED CONTROL ASSEMBLY PARTS LIST...............................................................6.2
7. DRIVE ASSEMBLY
REMOVAL AND DISASSEMBLY..................................................................................7.1
DRIVE ASSEMBLY PARTS LIST ..................................................................................7.3
8. MIXER HOUSING ASSEMBLY
MIXER HOUSING...........................................................................................................8.1
MIXER HOUSING ASSEMBLY PARTS LIST...............................................................8.2
9. APPENDIX.............................................................................................................................9.1
Page I

LIST OF ILLUSTRATIONS
DESCRIPTION PAGE
FIGURE 1 OVERALL VIEW OF MIXER....................................................................................III
FIGURE 2 LUBRICATION DIAGRAM......................................................................................2.3
FIGURE 3 TRANSMISSION ASSEMBLY .................................................................................3.2
FIGURE 4 BEATER HEAD ASSEMBLY....................................................................................3.4
FIGURE 5 BEVEL GEAR DRIVE ASSEMBLY (STANDARD) ................................................3.6
FIGURE 6 POWER TAKE-OFF ASSEMBLY (OPTIONAL) .....................................................3.8
FIGURE 7 INPUT ASSEMBLY .................................................................................................3.10
FIGURE 8 VERTICAL SHAFT ASSEMBLY............................................................................3.12
FIGURE 9 TRANSMISSION & SHAFT ASSEMBLY..............................................................3.14
FIGURE 10 BOWL SUPPORT ASSEMBLY.................................................................................4.2
FIGURE 11 BOWL LIFT ASSEMBLY..........................................................................................5.2
FIGURE 12 SPEED CONTROL ASSEMBLY..............................................................................6.2
FIGURE 13 DRIVE ASSEMBLY...................................................................................................7.4
FIGURE 14 MIXER HOUSING ASSEMBLY...............................................................................8.2
FIGURE 15 CUTAWAY VIEW OF MIXER ..................................................................................9.1
FIGURE 16A WIRING DIAGRAM 115/208-240V, 60HZ, 1PH / 220-240V, 50-60HZ, 1PH.........9.2
FIGURE 16B WIRING DIAGRAM 460V, 60HZ, 3PH....................................................................9.3
FIGURE 16C WIRING DIAGRAM 208-240V, 60HZ, 3PH 220-240V, 50HZ, 3PH ......................9.4
Page II

OVERALLVIEW OF FOOD MIXER
FIGURE 1
1. BOWL SUPPORT 10. LOWER MOUNTING BRACKET
2. BOWL 11. UPPER MOUNTING BRACKET
3. BOWL SUPPORT PIN 12. SPEED CONTROL LEVER
4. BEATER HEAD SHAFT 13. TIMER (OPTIONAL)
5. INGREDIENT CHUTE 14. SPEED INDICATOR LABEL
6. SWING RING SAFETY GUARD 15. START PUSH-BUTTON (GREEN)
(
7. MAGNET 16. STOP PUSH-BUTTON (RED)
8. PTO HUB 17. BOWL LIFT HANDLE
9. THUMB SCREW
18. REAR ACCESS PANEL
19. BOWL SCRAPER SHAFT
Page 9

SRM12 TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSE REMEDY
1. Mixer will not operate. 1.1 Timer not turned on.
1.2 Burned switch contacts.
1.3 Electrical service down.
1.4 Burned out motor.
1.5 Safety ring not mounted
or closed.
1.6 Bowl not raised.
1.1 Turn timer on.
1.2 Replace.
1.3 Check electrical service.
Replace fuse or reset circuit
breaker if necessary.
1.4 Remove, test, repair or
replace.
1.5 Install safety ring.
1.6 Raise bowl completely.
2. Mixer runs but agitator
will not turn.
2.1 Drive belt off pulley.
2.2 Key or pin sheared on
input shaft, input gear,
bevel pinion, bevel gear,
vertical shaft or beater
head.
2.3 Shifting speed with mixer
not running.
2.1 Reinstall drive belt on motor
pulley and adjust mounting
center distance.
2.2 Locate by step inspection and
replace defective part.
2.3 With mixer running, slowly
move speed control lever
fully forward then backward
to re-engage belt.
3. Agitator stalls during
mixing.
3.1 Mixer bowl is overloaded.
3.2 Speed is set to high for
the mix.
3.3 Loose belt.
3.4 Contamination of belt
with grease.
3.1 Adjust contents of bowl.
3.2 Shift speed lower till action
rotates smoothly.
3.3 Readjust pulley center
distance to tighten belt.
3.4 Clean pulleys and replace
belt.
4. Speed does not change
properly.
4.1 Loose belt.
4.2 Vari-speed pulley
inoperative.
4.1 Tighten or replace belt.
4.2 Remove, clean and lubricate
or replace.
5. Mixer runs, but
repeatedly cuts out and
stops.
5.1 Bowl overloaded.
5.2 Speed is set too high for
the mix.
5.3 Service voltage too low or
fluctuating.
5.1 Adjust contents of bowl.
5.2 Reduce speed.
5.3 Check electrical voltage.
6. Attachments contact
bottom of bowl.
6.1 Dented bowl.
6.2 Bowl height is set too
high.
6.1 Remove dent or replace bowl.
6.2 Reset bowl height.
Page 1.1

SRM12 TROUBLESHOOTING GUIDE (CONTINUED)
7. Attachments contact
side of bowl
7.1 Dented bowl.
7.2 Insufficient clearance
between bottom of bowl
and beater.
7.1 Remove dents or replace bowl.
7.2 Adjust bowl height.
8. Excessive noise 8.1 Gears need to be repacked
with grease.
8.2 Badly worn or frayed drive
belt.
8.3 Attachments hitting bowl.
8.4 Overloaded mixing bowl.
8.1 Locate source by inspection
and repack with grease.
8.2 Replace belt.
8.3 Inspect for cause in items
6 & 7 above.
8.4 Adjust contents of bowl
Page 1.2

MECHANICS MAINTENANCE
Every six months a mechanic should perform the following inspection and maintenance.
1. BELT:
a. WARNING: Start the mixer and adjust the speed control (Figure 1 [9]) to speed 4. Stop the
mixer. FOR SAFETY, DISCONNECT THE ELECTRICAL POWER CORD.
b. Remove the top cover (Figure 14 [9]) per section 2 mechanics maintenance “REMOVAL OF
TOP COVER” on page 2.4.
c. Remove the rear access panel (Figure 14 [11]).
d. Check the belt (Figure 13 [14]). If broken, glazed or worn, replace it.
e. Check the belt for proper tension. The outer edge of the belt should be flush with the outer diam-
eter of the variable speed pulley (Figure 13 [15]). If not, adjust it by loosening the jam nut (Fig-
ure 13 [21]) and turning the connecting rod (Figure 12 [11]) until the outer edge of the belt is
flush with the outer diameter of the variable speed pulley. Retighten the jam nut.
f. Plug in the electrical power supply cord and turn the mixer on. Adjust the speed control to speed
1 and then back to speed 4. Stop the mixer and DISCONNECT THE ELECTRICAL POWER
SUPPLY CORD.
g. Recheck that the belt is flush with the outer diameter of the vari-speed pulley.
Belt flush with pulley flange
Page2.1

MECHANICS MAINTENANCE
2. MOTOR:
Check the motor (Figure 13 [6]) for overheating, noise and excessive end play of the shaft.
Replace the motor if defective.
3. BOWL LIFT ADJUSTMENT: (Figure10)
a. Place the 12 quart mixing bowl on the bowl support (Figure 1 [17]) and the 12 quart batter beater
on the beater head shaft (Figure 1 [1]).
b. Raise the bowl support to the up position.
c. Check the clearance between the bottom of the bowl and the lowest point of the batter beater.
The clearance should be 3/16 inch, plus or minus 1/16 inch.
d. If adjustment is required, disconnect the electrical power supply cord, loosen the hex head cap
screws (Figure 10 [13]) and raise or lower the bowl until the correct clearance is obtained.
Retighten the screws.
Hex Head
Cap Screws
Page 2.2

LUBRICATION
The lubrication instructions are in Figure 2. The motor has pre-lubricated bearings with a service
interval of ten years. The transmission and beater head gearing are packed with Nevastane 5P7 grease.
They must be repacked every 500 working hours of the mixer.
WARNING: NEVER WORK ON THE TRANSMISSION WITH THE MIXER RUNNING.
IT IS RECOMMENDED THAT THE ELECTRICAL SERVICE POWER CORD BE DISCON-
NECTED TO PREVENT ACCIDENTAL START UP.
LUBRICATION INSTRUCTIONS
FIGURE 2
Molykote BR2 Plus
B
Internal Gear
C
machine oil.
B
Bowl Lift
Medium (3 weight)
Slide
A
Grease yearly with
Oil yearly
C
Grease every 5
hours of operation
with food grade
grease.
Bowl Lift
Bearing
Spur Gear
ASpeed Control
A
Bearing
B
B Bevel Gear
Page 2.3

MECHANICS MAINTENANCE
REMOVAL OF TOP COVER
a. The top cover (Figure 14 [9]) must be removed to perform maintenance operations on the mixer.
It is secured by a spring clip at its front end and a screw in back. Before removing the top cover
DISCONNECT THE ELECTRICAL POWER CORD. Remove the screw in the rear, lift the rear
of the cover and push it forward about 2 inches and lift it off.
b. Reinstall the top cover in the reverse of the above procedures using care to insure that the cover
sits squarely and uniformly on the mixer housing.
Rear Access Panel
Top Cover Screw
Top Cover
Page 2.4

REPAIR INSTRUCTIONS
TRANSMISSION: (Figure 3)
REMOVAL:
1. WARING: DISCONNECT THE ELECTRICAL POWER SUPPLY CORD.
2. Remove the mixer top cover (Figure 14 [9]) per section 2, mechanics maintenance “REMOVAL
OF TOP COVER” instructions on page 2.4 and remove the rear access panel.
3. Adjust the speed control lever (Figure 1 [9]) to low speed, then back to high speed. Loosen the
belt retainer and remove the belt from the top pulley.
4. Loosen the 2 set screws and remove the upper pulley and key from the input shaft.
5. Loosen the set screws on the input shaft bearing.
5. CAUTION: The transmission assembly is heavy and must be supported prior to removing it.
Remove the four 1/2-20 hex head cap screws (Figure 3 [8]) securing the transmission housing to
the mixer housing. Remove the transmission assembly and pace it on a workbench.
6. Remove the transmission cover (Figure 3 [2]) by removing the four phillips pan head screws
(Figure 3 [3]) and sliding it towards the rear and lifting up.
7. Rotate the gear train by hand and inspect it for worn or chipped gears, bent shafts, worn bearings
and excessive backlash. Removal of grease may be necessary. Backlash, measured at the gear
teeth, exceeding .030 inch is considered excessive. After inspecting the gear train to isolate any
problems, proceed to disassembly. 1 2-20 Hex Head Screws
Top Pulley
Belt Retainer
Page 3.1
Set Screws
Input Shaft Bearing
Set Screws

Transmission Assembly
Figure 3
Illus Part No Description Qty
11012440 Housing, Transmission 1
1012017A Transmission Cover Assembly (Includes 2 - 6)
21012017 Cover, Transmission 1
31200012 Screw, Phillips Pan Head 10-32 X 1/2 6
41024041 Spring 1
51200076 Washer, Flat #10 6
64400065 Washer, Split Lock #10 6
78800022 Foam Strip 1
81200057 Screw, Hex Hd Cap 1/2-20 X 1 4
91200085 Washer, Split Lock 1/2 4
10 1200084 Washer, Flat 1/2 4
11 4400194 Pin, Dowel 1
1012116A Internal Gear Kit (Includes 5, 6, 12, 13)
12 1200440 Screw, Socket Head Cap 10-32 X 1 4
13 1012116 Gear, Internal 1
1012439A Magnet Kit (Includes 14, 15)
14 1012439 Magnet 2
15 1012438 Holder, Magnet 2
1012447A Transmission Wrap Assembly (Includes 16, 17)
16 1012447 Wrap, Transmission 1
17 4400503 Label, Univex 1
Page 3.2
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17
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Beater head assembly: (Figure 4)
1. Remove the 3/8-24 hex head cap screw, (left hand thread), and remove the beater head
assembly using the two jack screws if necessary.
2. With tool T1201 remove the drive pin (Figure 4 [3]).
3. Remove the retaining ring [9], beater head pinion gear [8] and the key [4] from the
beater head shaft.
NOTE: If a gear requires replacement, always replace it’s mating gear.
Jack Screws
3 8-24 Cap Screw
NOTE: left hand thread
Page 3.3

Illus Part No Description Qty
1000419A Beater Head Assembly (Includes All)
18800041 Beater Head Housing 1
21012107 Shaft, Beater Head 1
34400400 Pin, Drive 1/4 X 1 1
41200113 Key, Woodruff #9 1
51012167 Bearing, 6205LL 2
61012110 Spacer 1
71200118 Retaining Ring, Internal 1
81012114 Pinion Gear, Beater Head 1
91200120 Retaining Ring, External 3
10 8900038 Screw, Socket Hd Set 3/8-16 X 1-1/4 2
11 1020002 Ring, Splash 1
12 4400269 Label, Rotation 1
13 4400499 Washer 7/16 1
14 1200051 Screw, Hex Hd Cap SS 3/8-24 X 1-1/4 LH 1
15 1200400 Pin, Roll 1
16 1000438 Shaft, Bowl Scraper 1
17 1200110 Pin, Bowl Scraper 1
Figure 4
Beater Head Assembly
Page 3.4
13
12
15
11
1
2
3
4
5
6
5
7
8
9
17
16
10
14

BEVEL GEAR DRIVE ASSEMBLY WITHOUT POWER TAKE-OFF (STANDARD): (Figure5)
1. Remove the retaining ring (figure 5 [11]) from the end of the shaft and remove the spur
gear [10] and key [12] from the shaft.
2. Remove the three 1/4-20 hex head cap screws [5 & 14]), Washers [3 & 4], deflector [2]
and withdraw the bevel gear drive shaft assembly from the transmission housing.
Bevel Gear
1 4-20 Hex Head
Cap Screws
Spur Gear
Housing Bevel Gear Bevel Gear Shaft
Bevel Gear Drive Shaft Assembly
Without PTO (standard)
Page 3.5

Bevel Gear Drive Assembly (without PTO)
Figure 5
Illus Part No Description Qty
1012519 Bevel Gear Drive Assembly (Includes All)
11012446 Housing 1
21024417 Lubrication Deflector 1
31200075 Flat Washer 1/4 1
44400005 Lock Washer 1/4 3
51200022H Hex Hd Cap Screw 1/4-20 X 1 1
61030019 Bearing 2
71200117 Retaining Ring, Internal 1
81012309 Gear, Bevel 1
91012429 Shaft, Bevel Gear 1
10 1020004 Gear, Spur 1
11 1200119 Retaining Ring, External 5
12 1200113 Key, Woodruff #9 1
13 1200103 Roll Pin, 5/16 X 1-1/7 1
14 1200025H Hex Hd Cap Screw 1/4-20 X 3/4 2
Page 3.6
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POWER TAKE-OFFASSEMBLY (OPTIONAL): (Figure 6)
1. Remove the retaining ring (figure 6 [16]) from the end of the PTO shaft and remove the
spur gear [15] and key [14] from the shaft.
2. Remove the three 1/4-20 hex head cap screws [9 & 18]), Washers [7 & 8], deflector [6]
and withdraw the power take-off assembly from the transmission housing.
Bevel Gear
1 4-20 Hex Head
Cap Screws
Spur Gear
Page 3.7
Power take-off assembly
Power Take-Off Housing Bevel Gear Power Take-Off Shaft

Power Take-Off Assembly
Figure 6
Illus Part No Description Qty
1012518 Power Take-Off Assembly (Includes All)
18800033 Cover 1
28900019 Screw, Slotted Flat Head 2
34400210 Washer, PTO 1
48800012 Adaptor, PTO 1
54400030 Housing, PTO 1
61024417 Lubrication Deflector 1
71200075 Washer, Flat 1/4 1
84400005 Washer, Lock 1/4 3
91200022H Screw, Hex Hd Cap 1/4-20 X 1 1
10 1030019 Bearing 2
11 1200103 Roll Pin, 5/16 X 1-1/4 1
12 1012309 Gear, Bevel 1
13 1012320 Shaft, PTO 1
14 1200113 Key, Woodruff Key #9 1
15 1020004 Gear, Spur 1
16 1200119 Retaining Ring, External 5
17 1200117 Retaining Ring, Internal 1
18 1200025H Screw, Hex Hd Cap 1/4-20 X 3/4 2
19 4400229 Knob, PTO 1
Page 3.8
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INPUTASSEMBLY: (Figure 7)
1. Remove the retaining ring (Figure 7 [6]) and withdraw the input shaft assembly from the
transmission housing.
2. Remove the retaining ring [1] and remove the bearing [2] from the input shaft assembly.
3. Remove one retaining ring [3], pinion gear [4] and woodruff key [7] from the input shaft
assembly.
Retaining Ring
Page 3.9
Input Assembly
Input Pinion Gear
Bearing
Input Shaft
Retaining Ring

Input Assembly
Figure 7
Illus Part No Description Qty
1012520 Input Assembly (Includes All)
11200120 Retaining Ring, External 1
21012167 Bearing, 6203LL 1
31200119 Retaining Ring, External 3
41020010 Gear, Pinion 1
51030019 Bearing, 6204LL 1
61200117 Retaining Ring, Internal 1
71200113 Key, Woodruff #9 1
81012322 Shaft, Input 1
94400230 Key, Square 3/16 X 1-1/2 1
10 4400141 Nut, Kep 1/4-20 2
11 1200075 Washer, Flat 1/4 2
12 1012306 Bearing Flange 1
13 1200025H Screw, Hex Hd Cap 1/4-20 X 3/4 2
Page 3.10
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