Diamond Air DA425EA User Manual Download | Manualshive

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DA425EA: 99900679:

i

19990121

Model DA425EA

Underhood Air Compressor

(Replaces Model HD750)

IOWA MOLD TOOLING CO., INC.

BOX 189, 500 HWY 18 WEST, GARNER, IA 50438

TEL: 515-923-3711

TECHNICAL SUPPORT FAX: 515-923-2424

MANUAL PART NUMBER 99900679

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Summary of Contents for DA425EA

Page 1: ...9 i 19990121 Model DA425EA Underhood Air Compressor Replaces Model HD750 IOWA MOLD TOOLING CO INC BOX 189 500 HWY 18 WEST GARNER IA 50438 TEL 515 923 3711 TECHNICAL SUPPORT FAX 515 923 2424 MANUAL PART NUMBER 99900679 ...

Page 2: ...SE DEATH SERIOUS INJURY OR PROPERTY DAMAGE Drain air tank after each use to prevent moisture build up and corrosion which leads to tank failure Assure that tank and compressor relief valves work properly and are at correct pressure settings DO NOT modify or repair air tank NEVER drive vehicle with pressure in air tank ...

Page 3: ...T 5 2 5 4 CRANKSHAFT AND BEARING REPLACEMENT 5 2 5 5 CLUTCH REPLACEMENT 5 3 5 6 TROUBLESHOOTING 5 4 LIST OF ILLUSTRATIONS FIGURE TITLE PART NUMBER PAGE A 1 OUTSIDE DIMENSIONS 1 1 C 1 AUTOMATIC SPEED CONTROL OPTION 3 1 D 1 ROUTINE MAINTENANCE CHECKLIST 4 1 D 2 AIR COMPRESSOR PARTS 51711330 4 2 D 2A AIR COMPRESSOR PARTS 51711330 4 3 D 2B AIR COMPRESSOR PARTS 51711330 4 4 D 3 PRESSURE SWITCH KIT INST...

Page 4: ...of operations and you need to contact the distributor or manufacturer for availability 51711330 01 19970619 UNDERHOOD AIR COMPRESSOR 2 60025010 CYLINDER BLOCK 2 W 3 60025008 CYLINDER HEAD 2 W 5 70073031 VALVE PLATE 2 C 18 76039141 AIR INTAKE FILTER FOAM 2 P 33 76393802 FILTER SCREEN 4 P 44 51704023 INSERT ASM 1 C 66 51029296 CONNECTING ROD 4 W 84 51704321 CRANKSHAFTASM 1 W 87 51014947 RING SET 1 W...

Page 5: ...ngaged and disengaged by use of an air pressure sensing electric switch The pressure switch is preset on factory installed units at approximately 120 PSI to engage and 150 PSI to disengage CAUTION OPERATING THE COMPRESSOR AT PRESSURES ABOVE 150 PSI WILL SHORTEN THE SERVICE LIFE AND VOID THE WARRANTY 1 2 SPECIFICATIONS Bore 2 5 8 Stroke 2 Cylinder Configuration V4 Displacement 35 CFM Delivery 25 CF...

Page 6: ...CTIVE AND WILL NOT PROVIDE A GROUND 5 Connect the positive side of the compressor switch to the power switch Connect the other side of the switch to the underhood safety switch and the indicator lamp 6 Install the throttle cable mounting bracket to the underside of the dash near the switch bracket Install the cable and connect to the carburetor linkage Make certain that there is enough free play t...

Page 7: ... hood to provide adequate ventilation start the vehicle engine and engage the compressor by operating the compressor switch in the cab On systems without automatic engine speed control adjust the engine RPM with the manual throttle cable to maintain the proper RPM setting while the compressor is pumping The system will now function automatically It will engage the compressor clutch when the air pr...

Page 8: ...DA425EA 99900679 3 2 19930125 ...

Page 9: ...ction 4 MAINTENANCE PARTS FIGURE D 1 ROUTINE MAINTENANCE CHECKLIST 4 1 GENERAL The following table is a list of routine maintenance items including service intervals It also includes a parts list and assembly drawing of the compressor ...

Page 10: ...F KEY 6 1 53 70055009 REAR CONE BRG PART OF 84 1REF 54 60101269 OIL PUMP COLLAR 1REF ITEM PART NO DESCRIPTION QTY 55 72066307 DRIVE PIN PART OF 84 1REF 56 70055010 REAR BRG CUP PART OF 82 1REF 57 60025005 REAR BRG HSG PART OF 82 1REF 58 70014583 COIL SPRING 1 59 60101505 SLEEVE 1 60 70051006 OIL PUMP 1 61 60025006 PUMP COVER 1 63 72053411 PLUG 1 8NPT SQHD 2 64 72060731 SCR 5 16 18X3 4 SH PART OF 8...

Page 11: ...DA425EA 99900679 4 3 19980521 FIGURE D 2A DA425EA UNDERHOOD AIR COMPRESSOR 51711330 2 ...

Page 12: ...DA425EA 99900679 4 4 19970619 FIGURE D 2B DA425EA UNDERHOOD AIR COMPRESSOR 51711330 3 ...

Page 13: ...DIAG COMPRESSOR 1REF REMOTE MOUNTED PRESSURE SWITCH INSTALLATION INSTRUCTIONS 99900501 1 Locate pressure switch mounting bracket 60119843 to the firewall or fender well of truck Use the predrilled holes on the mounting bracket as a pattern to drill holes when mounting 2 Assemble pressure switch and related hardware to the mounting bracket Attach a 90 brass elbow 72531042 to the bottom side of the ...

Page 14: ...GASKET KIT 51039013 7Q072212 O RING CYL HEAD 2 76039092 GASKET REAR BRG HSG 006 2 76039093 GASKET PUMP COVER 1 76039094 GASKET REAR BRG HSG 010 2 76039111 GASKET CYL BLOCK BOTTOM 2 76039112 GASKET FRT BRG HSG 2 76039113 GASKET VALVE COVER 2 76039114 GASKET CYL BLOCK TOP 2 76039119 SEAL 1 76039143 GASKET REAR BRG HSG 015 2 76039144 GASKET REAR BRG HSG 020 2 CHECK VALVE KIT 51704358 7Q073017 O RING ...

Page 15: ...SKET FAILURE TO FOLLOW THIS PROCEDURE MAY RESULT IN THE NEED TO RESEAL THE UNIT LATER 5 Hone the cylinder to break the glaze and to remove the buildup at the top of the cylinders 6 Measure the inside diameter of the cylinder for roundness and excessive wear The bore should be 2 625 0 0025 tolerance If the bore is oversized the cylinder must be replaced 7 With a ring expander remove the compression...

Page 16: ...ally opposed Strike the pump cover with a rubber faced mallet to jar the pump loose When the tension spring can be felt against the pump cover the pump is loose 7 Insert the two remaining bolts and torque to 180 inch pounds The bolts should be torqued in a diagonal pattern 8 Install the air compressor On the frame Connect the air lines and wiring 5 4 CRANKSHAFT AND BEARING REPLACEMENT If it is nec...

Page 17: ...TCH REPLACEMENT CAUTION CLUTCH FAILURE MAY BE DUE TO ALEAKING CHECK VALVE MAKE CERTAINTHATTHE CHECK VALVESARE FUNCTIONING PROPERLY BEFORE INSTALLING THE NEW CLUTCH THE CHECK VALVES MAY BE CHECKED BY PRESSURIZING THE TANK AND SHUTTING OFF THE COMPRESSOR THERE SHOULD BE NO AIR ESCAPING FROM THE UNLOADER VALVE IF THERE ISAIR ESCAPING THE CHECK VALVES ARE FAULTY The clutch assembly can be removed whil...

Page 18: ...lley slot aligns with the woodruff key Secure them with the 5 16 18 bolts 4 Rotate the pulley assembly manually to check for interference between the pulley and the coil If there is interference disassemble the clutch and repeat the procedure 5 Install and tighten the drive belts 6 Connect the coil wire to the air pressure switch 7 Move the compressor switch in the cab to the on position to activa...

Page 19: ...DA425EA 99900679 5 5 ...

Page 20: ...ervice items is performed by someone other than an authorized IMT dealer 2 if product is modified or altered in ways not approved by IMT PURCHASER S RESPONSIBILITY This warranty covers only defective material and workmanship It does not cover depreciation or damage caused by normal wear accident improper protection in storage or improper use The purchaser has the obligation of performing the care ...

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