Generac Power Systems MAGNUM MGG200 User manual

38108 ORG 12/15
PARTS MANUAL
01913
GASEOUS GENERATOR
MGG200 • MGG200G

ii
WARNING
CALIFORNIA PROPOSITION 65 WARNING: Engine exhaust and some of its constitu-
ents are known to the state of California to cause cancer, birth defects, and other
reproductive harm.
WARNING
CALIFORNIA PROPOSITION 65 WARNING: This product contains or emits chemicals
known to the state of California to cause cancer, birth defects, and other reproductive
harm.
WARNING
ENVIRONMENTAL HAZARD:Always recycle batteries at an official recycling center in
accordance with all local laws and regulations. Failure to do so could result in
environmental damage, death or serious injury.

iii
Introduction
Thispartsmanualwaspreparedbasedontheinformationavailableatthetimeofpublicationandissubjecttochange
without notice. Generac Mobile Products reserves the right to change parts at any time. To check whether a revised
parts manual is available, contact Generac Mobile Products.
DO NOT MODIFY or use this equipment for any application other than which it was designed for. To keep your
equipment fully operational, it is suggested you maintain a stock of commonly used maintenance or service parts.
A recommended spare parts list can be found in the back of this manual. To order service parts, please go to
www.generacmobile.com or call Generac Mobile Products.
WARNING
Before operating or servicing this equipment, read and understand the Generac
Operating Manual which was included with the unit when shipped from the factory.
Failure to do so increases the risk of injury to yourself or others.
GENERAC MOBILE PRODUCTS LLC
215 Power Drive • Berlin, WI 54923 U.S.A.
Phone: [phone]
FAX: [phone]
Toll Free: 1-800-926-9768
www.generacmobile.com
For technical or parts QUESTIONS, please contact the Generac Mobile Products Customer Support
or Technical Support team at 1-800-926-9768.
Engine Make:__________________________________________
Engine Serial Number:___________________________________
Engine Model Number: __________________________________
Generator Make: _______________________________________
Generator Model Number:________________________________
Generator Serial Number: ________________________________
Unit Model Number:_____________________________________
Unit Serial Number: _____________________________________
Dealer Name:__________________________________________
Dealer Phone Number: __________________________________

iv
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v
Table of Contents
Introduction .............................................................................................................................................. iii
Parts Manual Instructions............................................................................................................ 1
Enclosure Panels.................................................................................................................. 2
Unit Decals - Exterior............................................................................................................ 4
Unit Decals - Left Side Interior.............................................................................................. 6
Unit Decals - Right Side Interior ........................................................................................... 8
Unit Decals - Disconnect Box............................................................................................. 10
Front and Rear Panels to Unit............................................................................................ 14
Center Panels to Unit ......................................................................................................... 16
Door Assembly - Left.......................................................................................................... 18
Door Assembly - Right........................................................................................................ 20
Door Assembly - Right (with Manual Holder) ..................................................................... 22
Door Assembly - Louvered - Left........................................................................................ 24
Door Assembly - Louvered - Right ..................................................................................... 26
Front Enclosure Assembly.................................................................................................. 28
Catalyst Door Assembly ..................................................................................................... 30
Roof Assembly ................................................................................................................... 32
Rear Corner Assembly - Right............................................................................................ 34
Control Boxes and Lift Structure to Unit ............................................................................. 36
Control Box Assembly ........................................................................................................ 38
Connection Box Assembly.................................................................................................. 40
Disconnect Box Assembly.................................................................................................. 42
Lift Structure Assembly....................................................................................................... 44
Exhaust System Assembly................................................................................................. 46
Cooling System Assembly.................................................................................................. 48
Cooling System Hoses ....................................................................................................... 50
Fuel Water Separator Assembly......................................................................................... 52
Air Filter Assembly.............................................................................................................. 54
Fuel System Assembly - 1 of 2........................................................................................... 56
Fuel System Assembly - 2 of 2........................................................................................... 58
Turbocharger Assembly ..................................................................................................... 60
Engine and Generator to Unit............................................................................................. 62
Engine Assembly - Left Side .............................................................................................. 64
Engine Assembly - Right Side............................................................................................ 66
Generator Assembly........................................................................................................... 68
Skid Assembly.................................................................................................................... 70
Trailer Assembly................................................................................................................. 72
Axle Assembly.................................................................................................................... 74
Trailer Brake Lines ............................................................................................................. 76
Trailer Hitch Options........................................................................................................... 78
Recommended Spare Parts List......................................................................................... 80

vi
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38108 ORG MGG200/200G Parts Manual 1
Parts Manual Instructions
Product illustrations are only representations. Products supplied may vary from the illustrations in this parts manual.
Parts not shown in the illustration are indicated by a double dash (--) in the item column.
Please be prepared to provide the following information when ordering replacement parts: model number, serial
number (on unit serial tag), part number, purchase order number (if applicable), shipping address, shipping method.
Refer to the illustration below to locate the unit ID tag and Vehicle Identification Number (VIN) tag on the unit.
Important information, such as the unit serial number, model number, VIN and tire loading information are found on
these tags. Record the information from these tags so it is available if the tags are lost or damaged. When ordering
parts or requesting assistance, you may be asked to provide this information.
01914
Unit ID Tag
VIN Tag TIRE AND LOADING INFORMATION
RENSEIGNEMENTS SUR LES
PNEUS ET LE CHARGEMENT
SEE OWNER’S
MANUAL FOR
ADDITIONAL
INFORMATION
VOIR LE
MANUEL DE
L’USAGER
POUR
PLUS DE
RENSEIGNEMENTS
MANUFACTURED BY/FABRIQUE PAR: Generac MobileProducts LLC DATE: 00/0000
GVWR/PNBV: 000KG (0000LBS) COLD INF. PRESS./
PRESS. DE
V.I.N./N.I.V.:
00000000000000000
TYPE: TRAILER
MODEL:
XXX000
GAWR / PNBE TIRE / PNEU RIM / JANTE GONF AFROID - KPA(PSI/LPC) SGL/ DUAL
EACH
AXLE
THIS VEHICLE CONFORMS TO ALLAPPLICABLE STANDARDS PRESCRIBED UNDER THE U.S. FEDERAL MOTOR VEHICLE SAFETY STANDARDS(FMVSS)AND CANADIAN
MOTOR VEHICLE SAFETY REGULATIONS IN EFFECTON THE DATE OF MANUFACTURE.
CE VEHICULE EST CONFORME ATOUTES LES NORMES QUI LUI SONT APPLICABLES EN VERTU DU REGLEMENT SUR LA SECURITE DES VEHICULESAUTOMOBILES DU CANADA EN VIGUEUR A LA DATESA
FABRICATION.
The weight of cargo should never exceed 0000KG (0000LBS)
Le poids du chargement ne doit jamais depasser 0000KG (0000LBS)
Serial Number
V
A
Model
KVA
Manufacturing Code
1 ph. 1.0PF 3 ph. .8PF 3 ph. 1.0PF
KW
Country of Origin
Weight (lbs/kg) RPM/Frequency
Rating
Ins. Class
FOR ELECTRICAL EQUIPMENT
ONLY.POUR MATERIAL
ELECTRIQUE SEULEMENT.
209649
Form: SFC626B
Manufactured by GENERAC MOBILE PRODUCTS, LLC.,
[phone] [phone]

2 MGG200/200G Parts Manual 38108 ORG
ENCLOSURE PANELS
1
2
3
4
5
6
7
8
10
11
6
7
12
5
13
14
15
16
01915
19 9
18
18
17

38108 ORG MGG200/200G Parts Manual 3
ENCLOSURE PANELS
Item Part No. Qty Description Notes
1Page 28 1 Cover, exhaust bay MGG200 only
Page 28 1 Duct, exhaust - top MGG200G only
2Page 32 1 Roof - front
3Page 32 1 Roof - rear
4Page 22 2 Door, solid - right w/manual holder
5Page 18 2 Door, solid - left
6Page 26 2 Door, louvered - right
7Page 24 2 Door, louvered - left
8Page 14 1 Corner post, front - left
9Page 28 1 Duct, front - left
10 Page 28 1 Duct, front - right
11 Page 14 1 Corner post, front - right
12 Page 20 2 Door, solid - right
13 Page 34 1 Corner post, rear - right
14 Page 14 1 Panel, rear - center
15 Page 46 1 Assembly, disconnect box
16 Page 14 1 Corner post, rear - left
17 Page 28 1 Duct, bottom
18 Page 28 1 Duct, front side
19 Page 30 1 Assembly, catalyst door

4 MGG200/200G Parts Manual 38108 ORG
UNIT DECALS - EXTERIOR
Fuel Inlet
Natural gas • Well gas
Max. pressure: 20.0 PSI
Min. pressure: 10.0 PSI
ENGINE OIL DRAIN
COOLANT DRAIN
DANGER
GEFAHR
PELIGRO
DANGER
Combustible Gas
WARNING
WARNUNG
ADVERTENCIA
ADVERTISSEMENT
Fuel/Water Separator Drain
WARNUNG
ADVERTENCIA
AVERTISSEMENT
WARNING
01916
Located inside door
MAINTENANCE CHECKS
After the engine has stopped for at least 10 minutes,
the oil level should be at or near the top of the sight glass.
Ensure the engine oil reservoir valve is open to allow oil to flow to the
oil make-up controller. See manual for more information.
Critical Daily Checks
Verify trailer is as level as possible with tires blocked and jacks extended.
Check tire pressure.
Verify radiator and exhaust areas are clear of debris.
While the unit is running, the level in the sight glass will
fall just below half-way on the sight glass.
Engine Oil Level General
ITEM
Daily
SERVICE INTERVAL (HOURS)
First
50
Hours
Every
750
Hours
8000
Hours
(Annually)
BASIC MAINTENANCE SCHEDULE
Walk Around Inspection
Check Oil Level
Check Coolant Level
Check Tire Pressure
Check Belts
Check Electrical Wiring
Inspect Radiator for Signs of Obstruction or Damage
Inspect Gas Piping and Hoses for Leaks and Damage
Sample Engine Oil
Change Oil, Replace Oil Filters
Inspect/Replace Crankcase Ventilation Filters
Check All Flex Hoses
Check and Adjust Intake and Exhaust Valve Clearance
Service Battery
Inspect Battery Connections and Disconnect Switch
Lubricate Trailer Leveling Jacks
Check Engine and Generator Mounts
Drain, Flush and Refill Cooling System
Inspect Coolant Hoses
Replace Spark Plugs
Replace Ignition Coils
Visually Inspect Air Filter (replace if necessary)
Inspect Shutoff Valve for Leaks and Closing
Check Engine Air Induction for Leaks
Drain LPL Vaporizer Oil Build Up
Inspect Exhaust/Catalyst
⌧ Break-in period, one time.
Engine Stopped
Engine Running





⌧
⌧
⌧
⌧
⌧
⌧
⌧
⌧
⌧





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














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






⌧
⌧



Located inside door
1 1
1
1
1
1 1
1
3
3
MAINTENANCE CHECKS
After the engine has stopped for at least 10 minutes,
the oil level should be at or near the top of the sight glass.
Ensure the engine oil reservoir valve is open to allow oil to flow to the
oil make-up controller. See manual for more information.
Critical Daily Checks
Verify trailer is as level as possible with tires blocked and jacks extended.
Check tire pressure.
Verify radiator and exhaust areas are clear of debris.
While the unit is running, the level in the sight glass will
fall just below half-way on the sight glass.
Engine Oil Level General
ITEM
Daily
SERVICE INTERVAL (HOURS)
First
50
Hours
Every
750
Hours
8000
Hours
(Annually)
BASIC MAINTENANCE SCHEDULE
Walk Around Inspection
Check Oil Level
Check Coolant Level
Check Tire Pressure
Check Belts
Check Electrical Wiring
Inspect Radiator for Signs of Obstruction or Damage
Inspect Gas Piping and Hoses for Leaks and Damage
Sample Engine Oil
Change Oil, Replace Oil Filters
Inspect/Replace Crankcase Ventilation Filters
Check All Flex Hoses
Check and Adjust Intake and Exhaust Valve Clearance
Service Battery
Inspect Battery Connections and Disconnect Switch
Lubricate Trailer Leveling Jacks
Check Engine and Generator Mounts
Drain, Flush and Refill Cooling System
Inspect Coolant Hoses
Replace Spark Plugs
Replace Ignition Coils
Visually Inspect Air Filter (replace if necessary)
Inspect Shutoff Valve for Leaks and Closing
Check Engine Air Induction for Leaks
Drain LPL Vaporizer Oil Build Up
Inspect Exhaust/Catalyst
⌧ Break-in period, one time.
Engine Stopped
Engine Running





⌧
⌧
⌧
⌧
⌧
⌧
⌧
⌧
⌧





























⌧
⌧



4
4
2

38108 ORG MGG200/200G Parts Manual 5
UNIT DECALS - EXTERIOR
Item Part No. Qty Description Notes
1 38450 1 Decal set, safety
2 34784 1 Decal, gaseous genset - 28.0 x 13.60 MGG200G only
3 37600 2 Decal, maintenance
4 36610 2 Decal, mobile - 200

6 MGG200/200G Parts Manual 38108 ORG
UNIT DECALS - LEFT SIDE INTERIOR
HINWEIS
AVISO
AVIS
NOTICE
Turn off battery disconnect
to power down controller.
Lire et comprendre le manuel de l’utilisateur fourni avec
l’appareil avant de l’utiliser. L’omission de le faire augmente
le risque de blessure pour vous et pour les autres.
Lea y asegúrese de comprender el manual del operador
proporcionado antes de operar esta máquina. De lo contrario,
aumenta el riesgo de lesiones a usted y a otras personas.
Vor dem Betrieb dieser Maschine muss das Bedienerhandbuch
gelesen und verstanden worden sein. Ein Unterlassen erhöht das
eigene Verletzungsrisiko und das anderer.
Read and understand the supplied operator’s manual before
operating this machine. Failure to do so increases the risk
of injury to yourself or others.
ON
OFF
NEUTRAL BONDED TO FRAME
NULLLEITER AM RAHMEN ANGESCHLOSSEN
NEUTRO CONECTADO AL BASTIDOR
POSITION NEUTRE LORSQUE FIXÉ AU CADRE
WARNING
WARNUNG
ADVERTENCIA
AVERTISSEMENT
WARNUNG
ADVERTENCIA
AVERTISSEMENT
WARNING
Operator’s manual must be stored on machine. Replacement
operator’s manual can be ordered through your local
Magnum distributor.
Das Benutzerhandbuch muss an der Maschine aufbewahrt
werden. Zur Bestellung von Ersatzhandbüchern wenden Sie
sich bitte an Ihren Magnum-Händler.
El manual del operador debe guardarse en la máquina.
Puede solicitar un manual del operador de reemplazo a través
de su distribuidor local de Magnum.
Ranger le manuel de l’utilisateur avec l’appareil. Un manuel
de rechange peut être commandé auprès de votre distributeur
Magnum local.
01917
1
1
1
1
1
1
1
2
1
Do not touch. Electric heating
cable encased within. Line may
be hot even when unit is off.
ADVERTENCIA
Do not touch. Electric heating
cable encased within. Line may
be hot even when unit is off.
CAUTION
ATTENTION
ATENCIÓN
ADVERTENCIA
CAUTION
ATTENTION
ATENCIÓN
3
Located on oil level
controller hose

38108 ORG MGG200/200G Parts Manual 7
UNIT DECALS - LEFT SIDE INTERIOR
Item Part No. Qty Description Notes
1 38450 1 Decal set, safety
2 12142 1 Decal, ground
3 36609 1 Decal, caution - heat cable

8 MGG200/200G Parts Manual 38108 ORG
UNIT DECALS - RIGHT SIDE INTERIOR
WARNING
WARNUNG
ADVERTENCIA
AVERTISSEMENT
HINWEIS
AVISO
AVIS
NOTICE Close oil reservoir
supply valve before
transporting unit. If left
open, oil will overfill
the crankcase.
L1 L2 L3
111
01918

38108 ORG MGG200/200G Parts Manual 9
UNIT DECALS - RIGHT SIDE INTERIOR
Item Part No. Qty Description Notes
1 38450 1 Decal set, safety

10 MGG200/200G Parts Manual 38108 ORG
UNIT DECALS - DISCONNECT BOX
01919
1
1
1
1
2

38108 ORG MGG200/200G Parts Manual 11
UNIT DECALS - DISCONNECT BOX
Item Part No. Qty Description Notes
1 38450 1 Decal set, safety
2 12142 1 Decal, ground

12 MGG200/200G Parts Manual 38108 ORG
ROOF AND DOORS TO UNIT
01920
12
3
3
4
3
5
6
3
7
7
3
3
3
3
6
5
4

38108 ORG MGG200/200G Parts Manual 13
ROOF AND DOORS TO UNIT
Item Part No. Qty Description Notes
1Page 32 1 Assembly, roof
2 60024 28 Screw, M6-1.0 x 25 sflg hex
3 39635 16 Screw, M8-1.250 x 16 button hex, SS
4Page 20 2 Assembly, solid door - right
5Page 18 2 Assembly, solid door - left
6Page 26 2 Assembly, louvered door - right
7Page 24 2 Assembly, louvered door - left

14 MGG200/200G Parts Manual 38108 ORG
FRONT AND REAR PANELS TO UNIT
2
1
1
1
3
44
441
5
6
4
4
4
4
4
4
1
1
7
8
1
1
9
01921
4
4