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TRACKS
The track system of your Crawler is the result of over 25 years of compact crawler experience.
The track system is of an "unguided" design, but is extremely stable due to its double track
chain design. A few rules are listed below that if followed will give you maximum Track
performance.
1.
Avoid overloading your track system with the material you are working in. Always work
in loose materials by clearing a "driving path" with the attachment (Blade, Bucket, etc.)
you are using. This technique will allow a minimum of material to enter the track system.
2.
Avoid climbing on a pile of loose material and counter-rotating your tracks. This action
will "cork-screw" the Tracks into the pile and force unnecessarily large amounts of
material into the Tracks. The track system is designed to absorb a great deal of material,
but the less you force it to "digest", the greater will be the Track's stability and overall life.
3.
Periodically, following the Track Tensioning instructions in your Operator's/Technical
Manual, check your Track tension by checking the length of the #234 Track Tension
Spring.
Though this Spring adjustment is not a precise type of adjustment, it must be realized
that to over-tension the Spring will cause a higher level of wear in your track bearings,
while under-tensioning will cause potential derailing of your Track.
As always, the Struck Corporation through the customer service department, stands ready to
help you with any technical or work related questions you may have either now or in the future!
Call (262) 377-3300 or Fax (262) 377- 9247.
TIPS FOR TOP PERFORMANCE

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Summary of Contents for Struck MD750

  • Page 1 Track. As always, the Struck Corporation through the customer service department, stands ready to help you with any technical or work related questions you may have either now or in the future!
  • Page 2 This Operator’s / Technical Manual is sold strictly for non-commercial purposes. Its sale in no way licenses any individual or company to reproduce the MD750 in any form for resale. To do so will constitute a direct violation of all patents applicable at that time.
  • Page 3: Recognize Safety Information

    INFORMATION made compact Crawler. We are confident that the dependability and economical performance of your Struck. Crawler will prove that you made a This is the safety-alert symbol. When you wise choice. see this symbol on your Crawler or in this Manual, be alert to the potential for personal injury.
  • Page 4: Safety Rules

    SAFETY RULES Do not drive too close to the edge of a ditch or excavation. Watch for overhead wires. Do not touch wires Reports on accidents show that careless with any part of the Crawler or its Attachments. machinery causes high Do not leave your Crawler unattended with the percentage of accidents.
  • Page 5: Noise Protection

    Do not work under Crawler or raised equipment Never use an open flame as light anywhere on or unless it is correctly supported...contact factory for around the equipment. recommended procedures. When preparing Engine for storage, remember Before you work on the Engine or electrical that inhibitor is volatile and therefore dangerous.
  • Page 6: Controls And Instruments

    CONTROLS & INSTRUMENTS Learn the location and purpose of all controls, instruments, and warning labels. A - EMERGENCY / SERVICE BRAKE LEVER I - AMMETER J - ACCESSORY CONTROL VALVE B - LEFT TRACK CONTROL K- HC55 HYDRAULIC CIRCUIT CONTROL C - RIGHT TRACK CONTROL D - THROTTLE CONTROL E - CHOKE CONTROL...
  • Page 7 E M E R G E N C Y / S E RVICE B R A K E L E V E R By pushing fully forward on Lever (A) the brakes will be engaged. Brakes will lock if Lever RELEASING SEAT PAN pushed fully...
  • Page 8: Key Switch

    UNLEADED will engage engine GASOLINE ONLY. starter...release key and it will return automatically to ACCESSORY VALVE the Run position. Turn fully MD750 counter-clockwise to Off equipped with a 3 position to stop Engine. spool open-center Remove key. hydraulic valve operate the numerous hydraulic attachments available.
  • Page 9: Operation

    OPERATION CAUTION - Before you start the engine: Clear the work area of people and obstacles. PRE-STARTING INSPECTION Check the condition of the Crawler. (Pre- Before you start your Crawler for the first time start inspection). each day, perform the following checks: Be sure there is enough ventilation.
  • Page 10: Warm-Up Period

    continuously for more than 10 seconds at a time. TRAVELING If the Engine does not start, allow a 60-second cool-down period between starting attempts. Hold Brake Lever fully forward, then push Failure to follow these guidelines can burn out the outwardly, to unlock it from behind its "tab"...
  • Page 11 PARKING THE CRAWLER 1. Lower all Attachments to the ground. 2. Allow Right and Left Track Controls to go "slowly" to neutral. 3. Push fully forward on Main Drive Clutch/ Brake Lever and lock. 4. Run Engine at half speed 2 minutes without load.
  • Page 12 FUELS & LUBRICANTS HYDRAULIC OIL Use a premium quality hydraulic oil with maximum anti-wear properties, rust and oxidation FUELS treatment like Mobil-DTE Series 10 (ISO of 32). An ISO of 32 is good for “oil” temperature FUEL SPECIFICATIONS conditions of +5F to +170F which are considered standard.
  • Page 13: Every 50 Hours

    LUBRICATION "zerk" in Front Idler Rear Drive Assemblies. Remove zerks...try to have them on the "top-side". Using an oil can with SAE 30 motor oil, fill each reservoir through PERIODIC SERVICE threaded hole...do this at day's end to allow oil to soak into the bearings.
  • Page 14 Battery Check electrolyte level (if applicable) and fill with distilled water to the bottom of the filler neck. Filters Replace Engine Filter with filter recommended in Engine Owner's Manual. Replace Hydraulic Oil Filter Canister. Check Fuel Filter for dirt; if showing sediment, replace with new.
  • Page 15 SERVICE If the starter will not operate or operates sluggishly, check for the following: In the following Service section of this Manual, you will be required to do various assembly and Run down battery. disassembly procedures. Each section will try to Dirty, loose, or corroded cables and wires.
  • Page 16 COLD WEATHER BATTERY SERVICE SAFETY INTERLOCK SWITCHES During cold weather, keep electrolyte in battery at Two Switches, one in the Seat...and one on the correct level (if applicable). Keep battery fully Main Brake Lever, are used in the Crawler's charged. standard electrical system as safety devices.
  • Page 17: Brake Switch Test

    test is completed, remove continuity tester and Close Seat/Cover A s s e m b l y...check that it is replace original electrical connectors on both positively latched! terminals of Seat Switch. At this time, following recommended safe starting Following recommended safe starting...
  • Page 18: Drive Chain Tensioning

    DRIVE CHAIN TENSIONING The #2082 Drive Chains (#50 Roller Chain) are tightened by increasing the center distance between the movable #2065 Rear Axle and the 2033 fixed #2430 Sprocket & Shafts. Begin your Drive Chain Tensioning procedure by driving Crawler onto a firm, level surface. Shut off Engine and dismount...do not lock Main Drive Clutch/Brake Lever.
  • Page 19 make sure Seat Latch catches securely. If you have blocked-up your Crawler and removed its Tracks, replace Tracks and lower Crawler to ground at this time per Track Maintenance section of this Manual.
  • Page 20 ADJUSTMENT - BRAKES The Parking/Emergency Brake provides a force approximately equal to the strength of the Crawler’s drive system and is used in a number of ways. One way, is as a Parking Brake. In this capacity, it holds the Crawler in position when the Engine and drive system is shut off.
  • Page 21 #217A5 Clevis appropriately to adjust the length of the linkage. When satisfied with equal adjustment re-install the #2501 pin, secure with #910 Lynch pin, and tighten jut to secure #217A position. Hold each #225D Adjuster with wrench and tighten its respective #225C Jam Nut. DANGER: The proper adjustment and maintenance of your Disk Brakes can not be overemphasized! Double check your work...
  • Page 22: Track Maintenance

    TRACK MAINTENANCE Before attempting to complete any part of this Track Maintenance section, it is recommended that you read all three parts (Track Removal, Track Replacement and Track Tensioning) to provide background on how the total Tr a c k System is adjusted and maintained.
  • Page 23: Track Replacement

    Pulling forward on the Track will allow you to now NOTE: The preceding procedure is the same loop the Track off the remaining Outer Sprocket for the replacement of either Track. on the Front Idler allowing complete Tr a c k removal.
  • Page 24: Footrest Adjustment

    FOOTREST ADJUSTMENT Rotate (clockwise or counter-clockwise) the nut end of each #1030 Tension Rod so that its Right & Left Footrests (L) are adjustable in three respective #236 Washer (next to #234 Spring) is positions front to rear. To adjust, remove the three drawn forward (or released rearward) thereby 3/8"...

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