PDF Service Training Manual Bomag MPH 122-2 Soil Stabilizer - 5 MB
This service training manual is a deep dive into the systems of the Bomag MPH 122-2 Soil Stabilizer and Asphalt Recycler.
It's designed for technicians, providing detailed explanations of the hydraulic and electrical systems.
The manual serves as an excellent training resource and a field guide for advanced troubleshooting and repairs.
This is a must-have for any serious technician working on this equipment.
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--- Page 1 ---
Service - Training
MPH 122-2
S/N 101 590 06 .... >
S/N 101 590 07 .... >
Soil Stabilizer
Asphalt Recycler
Katalog Nr.
008 917 87 12/2011
--- Page 3 ---
Safety regulations 1.2
Environment l Fire extinguishers charged with FOAM, CO2 GAS
It is strictly prohibited to drain off oil into the soil, or POWDER must be available wherever fuel is
the sewer system or into natural waters. Old oil stored, filled in, drained off, or where work on fuel
must be disposed of according to applicable envi- systems is performed.
ronmental regulations. If in doubt you should con- l The vehicle battery must always be disconnected,
sult your local authorities. BEFORE work in the fuel system is started. Do not
disconnect the battery while working on the fuel
Hydraulics system. Sparks could cause explosion of the fuel
fumes.
l Always relieve the pressure in the hydraulic system
before disconnecting any lines. Hydraulic oil escap-
l Wherever fuel is stored, filled, drained off or where
ing under pressure can penetrate the skin and work on fuel systems is carried out, all potential ig-
cause severe injury. nition sources must be extinguished or removed.
Search lights must be fire proof and well protected
l Always make sure that all screw fittings have been against possible contact with running out fuel.
tightened properly and that hoses and pipes are in
mint condition before pressurizing the system
again.
Hot fuels
Please apply the following measures before draining
l Hydraulic oil leaking out of a small opening can
of fuel to prepare for repair work:
hardly be noticed, therefore please use a piece of
cardboard or wood when checking for leaks. When l Allow the fuel to cool down, to prevent any contact
injured by hydraulic oil escaping under pressure with a hot fluid.
consult a physician immediately, as otherwise this l
Vent the system, by removing the filler cap in a well
may cause severe infections. ventilated area. Screw the filler cap back on, until
l Do not step in front of or behind the drums, wheels the tank is finally emptied.
or crawler tracks when performing adjustment work
in the hydraulic system while the engine is running. Synthetic rubber
Block drums, wheels or crawler tracks with wedges.
Many O-rings, hoses, etc. are made of synthetic ma-
Reattach all guards and safety installations after terial, a so-called fluorocarbon elastomer. Under nor-
all work has been completed. mal operating conditions this material is safe and does
not impose any danger to health.
Environment However, if this material becomes damaged by fire or
extreme heat, it may decompose and form highly
It is strictly prohibited to drain off oil into the soil,
caustic hydrofluoric acid, which can cause severe
the sewer system or into natural waters. Oil oil
burns in contact with skin.
must be disposed of according to applicable envi-
ronmental regulations. If in doubt you should con- l
If the material is in such a state it must only be
sult your local authorities. touched with special protective gloves. The protec-
tive gloves must be disposed of according to appli-
Fuels cable environmental regulations immediately after
use.
l
If the material has contacted the skin despite these
!Danger
measures, take off the soiled clothes and seek
Repair work shall only performed by appropriately medical advice immediately. In the meantime cool
trained personnel or by the after sales service of and wash the affected area of skin over a sufficient
BOMAG. time with cold water or lime water.
Follow the valid accident prevention instructions when
handling fuels. Poisonous substances
The following notes refer to general safety precau- Some of the fluids and substances used are toxic and
tions for danger free handling of fuel. must under no circumstances be consumed.
Fuel vapours not only are easily inflammable, but also Skin contact, especially with open wounds, must be
highly explosive inside closed rooms and toxic; dilu- avoided.
tion with air creates an easily inflammable mixture. These fluids and substances are, amongst others,
The vapours are heavier than air and therefore sink anti-freeze agents, hydraulic oils, fuels, washing addi-
down to the ground. Inside a workshop they may eas- tives, refrigerants, lubricants and various bonding
ily become distributed by draft. Even the smallest por- agents.
tion of spilled fuel is therefore potentially dangerous.
008 917 87 BOMAG 11
--- Page 4 ---
General repair instructions 1.3
Feather keys and keyways Ball and roller bearings
Caution
! !Caution
Feather keys may only be reused if they are free of Ball and roller bearings may only be reused if they
damage. are free of damage and do not show any signs of
wear.
Fig. 4
l Clean and thoroughly examine the feather key.
l Deburr and thoroughly clean the edges of the key-
way with a fine file before reassembling.
Fig. 5
l If a ball or roller bearing of a bearing pair shows de-
fects, both ball or roller bearings need to be re-
placed.
l
Remove any lubricant residues from the ball or roll-
er bearing to be examined by washing it with gaso-
line or any other appropriate degreasing agent.
Ensure strict cleanliness.
l
Check balls or rollers, running surfaces, outer faces
of outer races and inner faces of inner races for vis-
ible damage. Replace the ball or roller bearing if
necessary.
l
Check the ball or roller bearing for clearance and re-
sistance between the inner and outer races, replace
if necessary.
l
Lubricate the ball or roller bearing with the recom-
mended type of grease before assembly or reas-
sembly.
l
On greased bearings (e.g. wheel bearings) fill the
space between ball or roller bearing and outer seal
with the recommended type of grease before as-
sembling the seal.
008 917 87 BOMAG 21
--- Page 5 ---
2 BOMAG Stabilizer / Recycler
008 917 87 BOMAG 31
--- Page 6 ---
Technical data 3.1
System Gear pump
Displacement cm3/rev 22.5
Max. steering pressure bar 190 ± 10
Steering valve Danfoss
Type OSPL 630 LS
System Rotary valve
Working valve
Type SP-2675-10/4SP-08PC
Pressure limitation steering, gate, bar 160 ± 10
cross-slope
Pressure limitation rotor up/down bar 200 ± 10
Priority valve
Type OLS80
Proportional valve, water injec-
tion
Type YC-551-32
High pressure limitation bar 200 ± 10
Max. water injection quantity l/min 500
Flow control valve, intercooler
Type HY/VHR4
Rear axle
Type 305/276/251; Steering axle
Differential Fixed value lock
Degree of locking % 45
Reduction ratio differential/tandem/ 54.8
wheel
working pump
Type HYZ
System Gear pump
Max. displacement cm3/rev 8
Other details
Charge circuit filter micron 12
Return flow filter micron 80
008 917 87 BOMAG 41
--- Page 7 ---
Running-in instructions 4.4
4.4 Running-in instructions
The following service work must be performed
when taking new machines into operation.
! Caution
Up to approx. 250 operating hours check the en-
gine oil level twice every day.
Depending on the load the engine is subjected to,
the oil consumption will drop to the normal level
after approx. 100 to 250 operating hours.
After a running time of 15 minutes retighten the V-
belts for generator and air conditioning compres-
sor*.
Maintenance after 50 operating hours
l Change engine oil and oil filter cartridge.
l Change all fuel filters.
l Retighten bolted connections on intake and exhaust
tubes, oil sump and engine mounts.
l Retighten all bolted connections on the machine.
Maintenance after 250 operating hours
l Change the oil in the front drive gears.
l Change the oil in the planetary drives of the rear
axle
l Change the oil in the rear axle reduction gear
l Change the oil in the rear axle.
Maintenance after 500 operating hours
l Change the oil in the front drive gears.
l Change the oil in the planetary drives of the rear
axle
Special intervals
l Switch the air conditioning on every month for about
10 minutes.
* Optional equipment
008 917 87 BOMAG 51
--- Page 8 ---
Understanding wiring diagrams 5.1
Overview of structural symbols
The structural identification overview represents the structure of the machine with respect to equipment, func-
tions and installation locations.
Structuring symbols are mainly abbreviations for machine parts/machines, functions and installation locations,
which were derived from designations in English.
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