MRF Edition A NOMENCLATURE





MRF Edition A Parts List For Basic Type Magnetos

Illustration #Part #DescriptionQuanity Used Remarks
1SC 1707SCREW & LOCKWASHER, fastening ventilator4 -
2NP 5222PLATE, name- ventilator2 -
3CV 52126COVER, ventilator2 -
4SN 526SCREEN, Ventilator2 -
4A-WASHER, Ventilator2 -
4B-GASKET, Ventilator2 -
5NT 6-12NUT, magnet rotor shaft1For magnetos without couplings
6WA 5-12WASHER, lock1For magnetos without couplings
7SC 1812SCREW, fastening- nameplate2 -
8NP 5292PLATE, Name2 -
9SC 1334SCREW, set- coil2 -
10HG 52633HOUSING, magneto- includes illustrated part 121For base mounted magnetos
10AHG 52634HOUSING, magneto- includes illustrated part 121For flange mounted magnetos
10BGA 52155GASKET, flange1 -
11FP 61561PLUG, felt2For base mounted magnetos
11ASC 1040SCREW, set2For flange mounted magnetos
12PN 1001PIN, locating- distributor plate2 -
13IS 52488INSULATION, high-tension conductor1 -
14aCL 524COIL, includes illustrated part 151For timing range magnetos
14bCL 52107COIL, includes illustrated parts 15b and 161For fixed spark magnetos
15aCB 52195CABLE, coil1For timing range magnetos
15bCB 52194Cable, coil1For fixed spark magnetos
17WA 1010WASHER, felt- magnet rotor shaft (drive end)1For base mounted magnetos
17AWA 1071WASHER, oil seal1For flange mounted magnetos
17BPK 521SEAL, oil1For flange mounted magnetos
18IS 222WASHER, insulation- ball bearing2-
19aIS 52265STRIP, insulation- ball bearingtwo of a or b .009" thick
19bIS 52266STRIP, insulation- ball bearingteo of a or b .008" thick
20BB 60226BEARING, ball2-
21WA 1204WASHER, grease retaining- ball bearing2 -
22KY 11-4KEY, woodruff- magnet rotor shaft (drive end)1-
23RT 52195ROTOR, magnet1-
24KY 11-3KEY, woodruff- magnet rotor shaft (breaker end)1 -
25aWA 61WASHER, spacing- magnet rotor shaftas req'd .012" thick
25bWA 106WASHER, spacing- magnet rotor shaftas req'd .007" thick
25cWA 107WASHER, spacing- magnet rotor shaftas req'd .004" thick
25dWA 1009WASHER, spacing- magnet rotor shaftas req'd .002" thick
26WA 81751WASHER, felt- magnet rotor shaft (breaker end)1 -
27SC 122-8CASCREW, fastening- insulation2-
28WA 1702WASHER, plain- fastening screw2-
29IS 52531INSULATION, bracket- distributor gear2-
30SC 1167SCREW & LOCKWASHER, fastening- hig tension conductor2-
31EC 5212CONDUCTOR, high-tension1 -
32-GEAR & ROTOR ASSEMBLY, distributor1 -
33-ROTOR, distributor1 -
34BB 1019(1)BEARING, ball- distributor gear bracket1 -
35BG 52185(1)BEARING, spacer1 -
36BK 52377(1)BRACKET, distributor gear- includes illustrated parts 34 & 351 -
37SC 1606SCREW & LOCKWASHER, fastening- distributor gear bracket4 -
39EC 1002CLIP, holding- coil cable1 -
40BL 522BLOCK, terminal1 For timing range magnetos
41SC 1169SCREW & LOCKWASHER, fastening- terminal block1For timing range magnetos
42WA 72613WASHER, plain- fastening screw1 For timing range magnetos
43EC 5214TERMINAL, coil and breaker plate cable1 For timing range magnetos
44CW 5210CONDENSER, complete1 For timing range magnetos
44ACW 5291CONDENSER, complete1 For fixed spark magnetos
45SC 1143SCREW & LOCKWASHER, fasteninmg- condenser1 -
46SC 1168SCREW & LOCKWASHER, fastening- condenser lead and terminal (43) to terminal block (40)1 For timing range magnetos
47-GEAR, drive1-
48WA 522WASHER, indicating1 -
49aSC 1229SCREW & LOCKWASHER, fastening- adjustable contact bracket1 For timing range magnetos
49bSC 1740SCREW & LOCKWASHER, fastening- adjustable contact bracket1 For fixed spark magnetos
50WA 72613WASHER, plain- fastening screw1 For fixed spark magnetos
51HP 5220HOOK, cam wick1 -
52WK 5234WICK, cam1 -
53CB 5227CABLE, grounding1 For timing range magnetos
54SC 1736SCREW & LOCKWASHER, fastening- breaker support plate2 For timing range magnetos
55SC 1307SCREW & LOCKWASHER, fastening- breaker plate2 For fixed spark magnetos
56WA 72613WASHER, plain fastening screw2 For fixed spark magnetos
57CB 52225CABLE, connecting- coil and condenser to breaker1 For timing range magnetos
58aBK 52334BREAKER PLATE ASSEMBLY, includes illustrated parts 49a, 51-54, 57, 60, 61, 64, 67-70, 74, 76 and 801 For timing range magnetos
58b-BREAKER PLATE ASSEMBLY, includes illustrated parts 49a, 51-54, 57, 60, 61, 63,64, 67-74, 81 and 821 For fixed spark magnetos
58cPL 52514PLATE, breaker- includes illustrated parts 51, 52, 57 and rivited parts1 For timing range magnetos
59a-BK 52333BREAKER PLATE ASSEMBLY, includes illustrated parts 49b-52, 60, 62, 63,65-70, and 741 For fixed spark magnetos
59b-BREAKER PLATE ASSEMBLY, includes illustrated parts 49b-52, 60, 62, 63,65-701 For timing range magnetos
59cBK 52347PLATE, breaker- includes rivited and illustrated parts 51 and 521 For fixed spark magnetos
60BK 525BRACKET, adjustable contact point1 -
61SC 1004SCREW, fastening- breaker lever spring1 For timing range magnetos
62SC 1563SCREW & LOCKWASHER, fastening--1 For fixed spark magnetos
63WA 5-4WASHER, plain- fastening screw1 -
64WA 1037WASHER, plain- fastening screw1 For timing range magnetos
65WA 1037WASHER, plain- fastening screw2 For fixed spark magnetos
66NT 1041NUT, fastening1 For fixed spark magnetos
67LE 522LEVER, breaker1 -
68WA 86678WASHER, plain- breaker lever stud1 -
69WA 1625WASHER, spacingas req'd -
70FP 84791PIN, cotter1 -
71-STUD, holding- stop plate1 -
72-SPRING, holding stud1 -
73-WASHER, plain- holding stud1 -
74BR 521BRUSH, grounding1 -
75aPL 526PLATE, stop (clockwise rotation)1 For 20' timing range
75bPL 529PLATE, stop (counter-clockwise rotation)1 For 20' timing range
75cPL 525PLATE, stop (either rotation)1 For 30' timing range
76SP 5213SPRING, coil- small- breaker plate stud1 For timing range magnetos
77SC 1169SCREW & LOCKWASHER, fastening-long-stop plate1 For timing range magnetos
78SC 1143SCREW & LOCKWASHER, fastening-short-stop plate1 For timing range magnetos
79WA 72613WASHER, plain- fastening screw2 For timing range magnetos
80SP 5214SPRING, coil- large- breaker plate stud1 For timing range magnetos
81-PLATE, grounding1 -
82-SCREW & LOCKWASHER, fastening--1 -
83a-CAM1 For timing range magnetos
83b-CAM1 For fixed spark magnetos
84WA 5241WASHER, plain- cam1 -
85SC 1165SCREW & LOCKWASHER, fastening- cam1 -
86aBR 5228BRUSH WITH SPRING, distributor plateas req'd SEE NOTE (1)
86bBR 5228BRUSH WITH SPRING, distributor plate, center1 -
87GA 523GASKET, distributor plate1 -
88a-PLATE, distributor- includes parts 94-961 -
88b-PLATE, distributor- includes parts 94-96, one of 98, and 113-1151 -
90WA 98922WASHER, plain- distributor plate fastening screw6 -
91WA 288WASHER, lock- distributor plate fastening screw6 -
92SC 1002SCREW, fastening- short- distributor plate2 -
93SC 1003SCREW, fastening- long- distributor plate4 -
94GA 1003GASKET, observation window1 -
95WN 521WINDOW, observation1 -
96SP 1001RING, spring- observation window1 -
97FP 81953TERMINAL, cable- high-tension1 per cyl -
98IS 82927NIPPLE, cable- high-tension1 pe cyl -
99GA 521GASKET, end cap1 -
100SH 529SHAFT, timing arm1 For timing range magnetos
101LE 526LEVER, timing1 For timing range magnetos
102WA 1003CAWASHER, plain- timing and shaft2 For timing range magnetos
103aCP 5210END CAP ASSEMBLY, includes illustrated parts 99-102, and 105-1121 For timing range magnetos
103b-END CAP ASSEMBLY, includes illustrated parts 99-102, 105-107, 111, 112, and 120-1231 For timing range magnetos
103c-END CAP ASSEMBLY, includes illustrated parts 99, and 125-1271 For timing range magnetos
103dCP 5215CAP, end- includes illustrated part 991 For timing range magnetos
104aCP 525END CAP ASSEMBLY, includes illustrated parts 99, 111 and 1121 For fixed spark magnetos
105SP 1002CARING, spring- timing arm shaft1 For timing range magnetos
106SC 1162SCREW & LOCKWASHER, fastening- timing arm1 For timing range magnetos
107LE 521ARM, timing1 For timing range magnetos
108WA 98922WASHER, plain- end cap fastening screw2 -
109WA 288WASHER, lock- end cap fastening screw2 -
110SC 1001SCREW, fastening- end cap2 -
111SC 1006CASCREW, grounding1 -
112WA 45279WASHER, lock-grounding screw1 -
113-TERMINAL, ceramic1 -
114-RESISTOR1 -
115-STUD, grounding1 -
116-PLATE, contact- grounding1 -
117-RING, spring- grounding switch1 -
118-SPRING, grounding switch1 -
119-SWITCH ASSEMBLY, grounding1-
120-STUD, holding- timing arm1 For timing range magnetos
121-PLATE, quadrant1 For timing range magnetos
122-WASHER, lock- holding stud1 For timing range magnetos
123-NUT, wing- holding stud1 For timing range magnetos
124-SPRING, grounding1 -
125-SPRING, holding- grounding contact switch1 -
126-CONTACT SWITCH ASSEMBLY1 -
127-SCREW & LOCKWASHER, fastening- holding spring1 -
128-WASHER, lock- grounding spring1 -
129-SPRING- grounding (includes knob)1 -
130-SCREW & LOCKWASHER, fastening- grounding spring1-
**1-DISC, drive1-
**2-IMPLUSE COUPLING ASSEMBLY- for parts and illustrations, see Coupling Section1-

**Not Illustrated

1. MRF 4A, 6A 4/1A and 4/2 180'A Magnetos require brushes in all distributor plate brush holders.
MRF 4/2A, 6/2A, 4/2 360'A, 6/2 360'A and 6/3A Magnetos require brushes in distributor plate brush holders of unplugged towers only.

1, 2, 101, 102 - 45mm Base Mounting, Fixed Spark
31, 32, 301, 302 - Vertical Flange Mounting, Fixed Spark
3, 4, 103, 104 - Base Mounting, 20' Timing Range
33, 34, 303, 304 - Flange Mounting, 20' Timing Range
5, 6, 105, 106 - Base Mounting, 35' Timing Range
35, 36, 305, 306 - Flange Mounting, 35' Timing Range

"E" Gap: 1-2 mm Point Opening: .014-.018"

Magneto type designations ending in odd numbers denote CCLW rotation as viewed from the drive end. Magneto type designations ending in even numbers denote CLW rotation as viewed from the drive end.

Basic magnetos having type designations in the 100 (Example: MRF 4A101)are supplied with ICB2A1 or 2 impulse couplings depending on rotation.

Basic magnetos having type designations in the 300 (Example: MRF 6A303)are supplied with ICA2A1 or 2 impulse couplings, depending on rotation.

Basic magnetos having type designations ending in one or two digit numbers (Examples: MRF4A5, MRF6A32) are not supplied with impulse couplings.

The part, or parts, affected by this reissue is indicated by a X at the left of the illustration number.




BASIC MAGNETO PART VARIATIONS

Ill. #MRF 4A MRF 4/1AMRF 4/2A MRF 4/2 180'A MRF 4/2 360'AMRF 6AMRF 6/2A MRF 6/2A 360'A
32GE 52404GE 52402GE 52406GE 52403
32 (180')-GE 52404--
32 (360')-GE 52404-GE 52400
33RT 52425RT 52428RT 52426RT 52423
33 (180')-RT 52425--
33 (360')-RT 52425--
47GE 5212GE 5212GE 5211GE 5211
83aCA 522CA 522CA 522CA 522
83a (360')-CA 524-CA 524
83bCA 52102CA 52102CA 52102CA 52102
83b (360')-CA 52105-CA 52105
88aDP 5240(2)DP 5240(2)DP 5239DP 5239(3)

ALL OTHER ILLUSTRATED PARTS USED ON VARIATIONS OF THESE MAGNETOS.

2. For MRF 4/1A, grounded towers # 2, 3, and 4.
For MRF 4/2A, fill top two towers with sealing wax.
For MRF 4/2 180'A, ground bottom two towers.
For MRF 4/2 360'A, ground towers # 2 and 4.
3. For MRF 6/2A, fill towers # 1, 3, and 5 with sealing wax.
For MRF 6/2 360'A, ground towers # 1, 3, and 5.


SERVICE PARTS LIST

For 4 Cylinder Non-Basic Fractional Magnetos
MAGNETO CODE

Part variations within the following group of magnetos are indicated by a code number, or a combination of code numbers, in the "Magneto Code" column.
Example: Illustration number 83, part number CA 52105--- cam, is applicable to magneto 5 only, namely MRF 4/1A308.



Code #MRF Mag VarMRF Basic MagInstallation #Customer NameUsed on Engine Model
14/1 A1104/1 A104F120Ingersoll-Rand Co.ZXVG
24/1 A1114/1 A105F121Clark Bros. Co.HS 1-2, HS 17 single L. H., HQ 1-2
34/1 A1184/1 A104F128Ingersoll-Rand Cp.XVG
44/1 A1204/1 A102F130Ingersoll-Rand Co.XVG
54/1 A308(1)4/1 A302F1308Ajax Iron WorksCM
64/2 180' A1144/2 180' A104F224YIngersoll-Rand Co.SVG, JVG, PVG, XVG
74/2 180' A1164/2 180' A102F226YIngersoll-Rand Co.SVG, JVG, PVG, XVG
84/2 360' A1074/2 360' A103F217ZIngersoll-Rand Co.-
94/2 360' A1094/2 360' A102F219ZIngersoll-Rand-
104/2 360' A1184/2 360' A106F2228ZCooper Bessemer Corp.GA-W, GD-S, GM-A, GM-B, GA-U, GD-T, GD-Q
114/3 A114(2)4A104F324Ingersoll-Rand Co.XVG, PVG
124/3 A116(2)4A102F326MIngersoll-Rand Co.XVG, PVG



Part Variations

Ill. #Part #Mag Code
83CA 521055
88aDP 526785
103bCP 52411, 3, 6, 11
-CP 52242, 10
-CP 52438
113EC 57115
114RE 5235
115SD 522105
120SD 52301, 2, 3, 6, 8, 10, 11
121PL 521361, 3, 6, 11
-PL 52682, 10
-PL 521478
122WA 22-51, 2, 3, 6, 8, 10, 11
123NT 10261, 2, 3, 6, 8, 10, 11
**2ICM 2A20-27'1, 3, 4, 6, 7, 11, 12
-ICM 2A19-37'2
-ICA 2A2-40'5
-ICM 2A19-27'8, 9
-ICM 2A12-37'10


FOR ALL OTHER REQUIRED PARTS, REFER TO THE APPLICABLE BASIC MAGNETO

1. Assemble brushes (86a) into distributor plate towers #1 and 3 only.
2. Ground distributor plate tower # 3.




SERVICE PARTS LIST

For 4 Cylinder Non-Basic Magnetos
MAGNETO CODE

Part variations within the following group of magnetos are indicated by a code number, or a combination of code numbers, in the "Magneto Code" column.
Example: Illustration number 88a, part number DP 52654 --- distributor plate, is applicable to magneto 2 only, namely MRF 4A102J.



Code #MRF Mag VarMRF Basic MagInstallation #Customer NameUsed on Engine Model
14A102(1)4A102F412Waukesha Motor Co.VX
24A102J4A102F412J--
34A106(2)4A106F416Waukesha Motor Co.FC Starting Engine for LRD Diesel Engine
44A1144A102F424Ingersoll-Rand Co., Waukesha Motor Co.VRZN
54A1194A101F429Caterpillar Tractor Co.E43
64A1224A106F432Ingersoll-Rand Co.-
74A1364A102F446Caterpillar Tractor Co.-
84A1384A102F448Caterpillar Tractor Co.E6, 10, 12, 13, 16, 19, 20, 26, 27, 30, 36, 38, 39, 67, 68
94A1404A106F450Caterpillar Tractor Co.T29, 37, 38, 39, 43, 45
104A1444A104F454Ingersoll-Rand Co.SVG,JVG,XVG,PVG,KVG,PKVG
114A1484A102F458Ingersoll-Rand Co.SVG,JVG,XVG,PVG,KVG,PKVG
124A3444A302F4334Hercules Motors Corp.-



Part Variations

Ill. #Part #Mag Code
10AHG 5266412
32GE 523712
33RT 524362
58bBK 523446
58cPL 525186
59bBK 523464
60BK 52534
67LE 52354
71SD 10016
72SP 5256
73WA 989046
75PL 5286
81PL 52466
82SC 14276
88aDP 526542
103aCP 52999
103bCP 524110
103cCP 52136
103dCP 52316
107LE 52459
120SD 523010
121PL 521361
122WA 22-510
123NT 102610
125SP 52186
126CT 52106
127SC 11546
**2ICB 2A20-20'1
**2ICB 2A2-40'2
**2ICB 2A20-40'3
**2ICB 2A2D-21'4
**2ICB 2A1-35'5
**2ICB 2A20-30'6
**2ICB 2A2-35'7, 8, 9
**2ICM 2A20-27'10, 11
**2ICA 2A90-20'12



FOR ALL OTHER REQUIRED PARTS, REFER TO THE APPLICABLE BASIC MAGNETO

1. Customer's part # 50262 stamped on nameplate.
2. Customer's part # 60435 stamped on nameplate.
** Not illustrated.



SERVICE PARTS LIST
For 6 Cylinder Non-Basic Unshielded Magnetos
MAGNETO CODE

Part variations within the following group of magnetos are indicated by a code number,or a combination of code numbers, in the "Magneto Code" column.
EXAMPLE: Illustration number 103b, part number CP 5241--- end cap assembly, is applicable to magnetos 1 and 15 only, namely MRF 6/2 360'A116 and MRF 6A132.


Code #MRF Mag VarMRF Basic MagInstallation #Customer NameUsed on Engine Model
16/2 360' A1166/2 360' A104F326ZIngersoll Rand Co.SVG,JVG,KVG,PKVG
26/2 360' A1186/2 360' A102F328ZIngersoll Rand Co.SVG,JVG,KVG,PKVG
36/2 360' A3086/2 360' A302F3308ZSchramm Inc.STARR
46A101(1)6A101F611Hercules Motors Corp.JXA,JXB.JXC,JXD
56A102(2)6A102F612Waukesha Motor Co.WAK,WAKB,NKR
66A102J6A102F612J--
76A1086A106F618Chicago Pneumatic Tool Co.HXE (Hercules)
86A1106A106F620Worthington Corp.BBGG
96A1126A102F622Waukesha Motor Co.6 WAK
106A1136A101F623National Supply Co.G-510, PTG
116A1146A102F624Waukesha Motor Co.6WAKH, 6NKH, 6LRH (Hessleman)
126A116J6A102F626Waukesha Motor Co.WAKB
136A1266A102F636Caterpillar Tractor Co.E43
146A1306A102F640Maxim Motor Co.-
156A1326A104F642Ingersoll Rand Co.KVG,PKVG
166A1386A102F648Caterpillar Tractor Co.D-1300
176A1406A102F650Ingersoll Rand Co.KVG,PKVG
186A301(3)6A301F6301Waukesha Motor Co.145GK
196A302J6A302F6302J--
206A308(4)6A302F6308Schramm Inc.Experimental Engine
216A3106A302F6310J. I. Case Co.610
226A3116A301F6311Minneapolis Moline Co.605-6; 1210-12A
236A312(4)6A306F6312Leroi Division Westinghouse Air Brake Co.L3000
246A313J6A301F6313Waukesha Motor Co.145-GKB
256A3146A302F6314Minneapolis Moline Co.HUA, HEB
266A318(5,6)6A302F6318Continental Motors Corp.R6602, R-602
276A3206A302F6320Continental Motors Corp.R-602
286A3226A302F6322Continental Motors Corp.F226
296A323(4)6A301b6323Chrysler Corp.31, 33
306A3256A305b6325Waukesha Motor Co., The Four Wheel Drive Auto Co.145GKB Fire Engine
316A3276A301F6327Leroi Division Westinghouse Air Brake Co.L3260, L4000, F1500
326A3286A302F6328Leroi Division Westinghouse Air Brake Co.L3460
336A3316A301F6331International Harvester Co.U-308, UR-372, UR-450, UR-501
346A3346A302F6334Hercules Motors Corp.G0



Part Variations

Ill. #Part #Mag Code
4AWA 528123
4BGA 521523
10AHG 5266434
32GE 523726, 12, 19, 24
33RT 524366, 12, 19, 24
44ACW 52979
58bBK 523447
58cPL 525187
59aBK 5234111
-BK 5233914, 28, 33
60BK 525311
-BK 523614, 28, 33
67LE 523511
-LE 522014, 28, 33
71SD 10017
72SP 5257
73WA 989047
75PL 5287
-PL 52118
81PL 52467
82SC 14277
88aDP 526993
-DP 526596, 12, 19, 24
103aCP 526723
103bCP 52411,15
103cCP 52137
103dCP 52317
107LE 527923
120SD 52301,15
121PL 521361,15
122WA 22-51,15
123NT 10261,15
125SP 52187
126CT 52107
127SC 11547
**1DC 7395,11,12
**2ICM 2A20-31'1,2
-ICA 2A2-30'3,20,28,33
-ICB 2A19-30'4
-ICB 2A2-45'5
-ICB 2A2-40'6
-ICB 2A20-24'7
-ICB 2A76-35'8
-ICB 2A20-31'9
-ICB 2A69-50'10
-ICB 2A2-31'11
-ICB 2A52-50'12
-ICB 2A52-51'13
-ICB 2A20-40'14
-ICM 2A20-27'15, 17
**2ICA 2A52-51'16
-ICA 2A1-40'18
-ICA 2A2-40'19
-ICA 2A18-30'21
-ICA 2A25-52'22
-ICA 2A52-50'23, 32
**2ICA 2A1-45'24, 30
-ICA 2A26-52'25
-ICA 2A7026
-ICA 2A6-30'27
-ICA 2A1-20'29
-ICA 2A51-50'31
-ICA 2A90-30'34



FOR ALL OTHER REQUIRED PARTS, REFER TO THE APPLICABLE BASIC MAGNETO


** Not Illustrated.
1. Customer's part # 50366-CS stamped on magneto nameplate.
2. Customer's part # 50362 stamped on magneto nameplate.
3. Customer's part # 60578 stamped on magneto nameplate.
4. Magneto is mounted in the inverted position. Ventilator covers and impluse coupling arrester plate to be assembled 180' from the standard position.
5. Assemble drive gear (not supplied by American Bosch) to coupling housing with timing marks on the gear (2 prick punch dots) between lug and timing mark on coupling housing.
6a. Magneto identified by customer's part # U-501M-414 requires a coupling automatic retard of 50' and drive gear U-501-H-305.
6b. Magneto identified by customer's part # R-602M-248 requires a coupling automatic retard of 70' and drive gear R-60H-300.
6c. Magneto identified by customer's part # R-602M-400 requires a coupling automatic retard of 50' and drive gear R-602H-300.
6d. Magneto identified by customer's part # T-427M-509 requires a coupling automatic retard of 50' and drive gear T-415H-301.





END