MHP3 Diesel User Manual ◄ 3
TABLE OF CONTENTS
SERVICING:   This manual contains safety, operation, and routine maintenance instructions. Stanley Hydraulic 
Tools recommends that servicing of hydraulic tools, other than routine maintenance, must be performed by an au-
thorized and certied dealer. Please read the following warning. 
For the nearest authorized and certied dealer, call Stanley Hydraulic Tools at the number listed on the back of this 
manual and ask for a Customer Service Representative.
SERIOUS INJURY OR DEATH COULD RESULT FROM THE IMPROPER REPAIR OR 
SERVICE OF THIS TOOL.
REPAIRS AND / OR SERVICE TO THIS TOOL MUST ONLY BE DONE BY AN 
AUTHORIZED AND CERTIFIED DEALER.
To ll out a Product Warranty Recording form, and for information on your warranty,  
visit Stanleyhydraulic.com and select the Warranty tab.  
(NOTE: The warranty recording form must be submitted to validate the warranty). 
SAFETY SYMBOLS ..................................................................................................................................................4
SAFETY PRECAUTIONS ..........................................................................................................................................5
TOOL STICKERS & TAGS ........................................................................................................................................7
HOSE TYPES ............................................................................................................................................................8
HOSE RECOMMENDATIONS ..................................................................................................................................9
HTMA REQUIREMENTS .........................................................................................................................................10
HOSE & FITTING CONNECTIONS FOR SINGLE TOOL CIRCUIT ....................................................................... 11
HOSE & FITTING CONNECTIONS FOR DUAL TOOL CIRCUIT ...........................................................................12
OPERATION ............................................................................................................................................................13
MAINTENANCE ......................................................................................................................................................19
TESTING & TROUBLESHOOTING ........................................................................................................................20
TROUBLESHOOTING ............................................................................................................................................21
SPECIFICATIONS ................................................................................................................................................... 22
ACCESSORIES.......................................................................................................................................................22
MHP3 DIESEL MAJOR ASSY PARTS ILLUSTRATION .......................................................................................... 23
MHP3 DIESEL MAJOR ASSY PARTS LIST ............................................................................................................24
MHP3 DIESEL HOSE & FITTINGS ILLUSTRATION – A ........................................................................................25
MHP3 DIESEL HOSE & FITTINGS PARTS LIST – A ..............................................................................................26
MHP3 DIESEL HOSE & FITTINGS ILLUSTRATION & PARTS – B ........................................................................ 27
MHP3 DIESEL POWER UNIT FRAME ILLUSTRATION ......................................................................................... 28
MHP3 DIESEL POWER UNIT FRAME PARTS LIST ..............................................................................................29
MHP3 DIESEL POWER UNIT ENGINE ILLUSTRATION & PARTS .......................................................................30
MHP3 DIESEL POWER UNIT RESERVOIR ILLUSTRATION & PARTS  ...............................................................31
MHP3 DIESEL POWER UNIT VALVE ILLUSTRATION & PARTS ..........................................................................32