John Deere. MODEL: Carburetors JD-S-SM2024

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1 John Deere MODEL: Carburetors THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF JOHN DEERE OR IT'S SUCCESSORS. JOHN DEERE AND IT'S SUCCESSORS ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL. TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS. JD-S-SM2024

2 CARBURETORS FOR JOHN DEERE TRACTORS AND ENGINES SERVICE MANUAL CARBURETORS FOR JOHN DEERE TRACTORS AND ENGINES SM2024 (01 JAN59) English JOHN DEERE TRACTOR WORKS SM2024 (01 JANS9)

3 SERVICE MANUAL FOR JOHN DEERE DEALERS CARBURETORS FOR JOHN DEERE TRACTORS AND ENGINES TABLE OF CONTENTS Page General Information Section 10 Carburetor Identification to Fuel Characteristics to Principles of Carburetion... : to Marvel-Schebler DL TX Single Induction Carburetors to Marvel-Schebler DL TX Dual Induction Carburetors to Zenith TU Series Cranking Engine Carburetors to Marvel-Schebler SL-2 Carburetor to Dual Induction LP-Gas Carburetors to Dual Induction LP-Gas Carburetors-Service Data to Marvel-Schebler TSG Series LP-Gas Carburetors to Marvel-Schebler TSX Series Carburetors to Marvel-Schebler TSX Series Carburetors-Service Data to Zenith OE1539B Carburetor to Zenith OE1539B Carburetor-Service Data to Zenith 62 Series Carburetors to Zenith 62 Series Carburetors-Service Data to Zenith 61, 68, and 161 Series Carburetors to Zenith 61, 68, and 161 Series Carburetors-Service Data to SM-2024(1-59) _.. 0 '" Gt-s'"

4 Identification Carburetors for John Deere Tractors and Engines Model Diesel 80 Diesel Diesel 720 Diesel Diesel 820 Diesel 820 Diesel 830 Diesel TRACTORS, POWER UNITS, AND IMPLEMENTS-Continued MAKE AND MODEL OF CARBURETOR USED ON EACH TRACTORS-Continued Serial No. Make and Model of Carburetor Remarks Marvel-Schebler DL TX All-Fuel and Up Marvel-Schebler DL TX (Single-I nduction) All-Fuel John Deere AA84R (Dual-I nd uction) LP-Gas and Up John Deere AA6268R LP-Gas and Up Marvel-Schebler DLTX and Up Marvel-Schebler D L TX (D ual-i nd uction) All-Fuel John Deere AA84R (Dual-I nduction) LP-Gas and Up John Deere AA6268R LP-Gas and Up Zenith TU3-1/2X1C.. Cranking Engine and Up Zenith TU3-1/2X1C... Cranking Engine and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX All-Fuel and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX All-Fuel Marvel-Schebler TSX and Up Marvel-Schebler TSX-688, and Up Marvel-Schebler TSX All-Fuel and Up Marvel-Schebler TSX Replacement for TSX-678 Carburetor and Up Marvel-Schebler TSG LP-Gas and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX All-Fuel and Up Marvel-Schebler TSG LP-Gas and Up Marvel-Schebler D L TX and Up Marvel-Schebler DL TX All-Fuel and Up John Deere AB5285R...,. LP-Gas and Up M arvel-schebler D L T X and Up Marvel-Schebler D L TX All-Fuel and Up Marvel-Schebler AB5285R... LP-Gas and Up Marvel-Schebler DLTX and Up Marvel-Schebler DL TX All-Fuel and Up John Deere AA6821 R LP-Gas and Up Marvel-Schebler DL TX-94..., and Up Marvel-Schebler DL TX All-Fuel and Up John Deere AA6821 R LP-Gas and Up Marvel-Schebler DLTX and Up Marvel-Schebler D L TX All-Fuel and Up John Deere AF2828R LP-Gas Zenith TU3-1/2X1C.. Cranking Engine and Up Zenith TU3X1C... Cranking Engine and Up Marvel-Schebler DL TX and Up Marvel-Schebler D L TX All-Fuel and Up John Deere AF2828R LP-Gas and Up Zenith TU3X1 C... Cranking Engine Zenith TU3-1/2X1C.. Cranking Engine and Up Zenith TU3X1 C... Cranking Engine and Up Zenith TU3X1C... Cranking Engine John Decre Part Number AA4056R AA5656R AA84R AA6268R AF15R AF1652R AA84R AA6268R AB5151 R AB5150R AB5285R AB5151 R AB5150R AB5285R AA6633R AA6632R AA6821R AA6633R AA6632R AA6821.R AF2827R AF2826R AF2828R AF2827R AF2826R AF2828R TA-92G TB-92G TA-145G TA-217G LUS LUS No.111W No. 113W SM-2024 (I-59) ""'II<CO s~ POWER UNITS and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX and Up Marvel-Schebler TSX L U S Marvel-Schebler TSX LUS 3537 and Up Marvel-Schebler TSX W-1000;-W-3789 [MarVel-schebler DL TX-6... All-Fuel Marvel-Schebler DL TX All-Fuel Marvel-Schebler D L T X All-Fuel W-1098-W-3789 (Marvel-Schebler DLTX-6... All-Fuel lmarvel-schebler DLTX All-Fuel Marvel-Schebler DL TX All-Fuel

5 Carburetors for John Deere Tractors and Engines Marvel-Schebler DLTX Single Induction Carburetors line models a calibrated economizer orifice. On some models, baffles are installed in the bowl vent to keep fuel from splashing into the economizer passage. A full description of the various systems in these carburetors, and the manner in which they operate, is given in Section 10 of this manual. TOOL KIT Figure illustrates a tool kit available for servicing carburetors. It can be obtained from the Owatonna Tool Company by ordering part number JD94. The kit contains sufficient special tools for servicing these carburetors. RETAINING NUT Figure DLTX-72 Carburetor on Holding Device Figure Carburetor Tool Kit Remove Float Valve Seat. Remove float valve seat with a socket wrench (Schebler Tool No. 725A). Remove and discard valve seat gasket. Figure shows valve seat in carburetor. DISASSEMBLY Mount carburetor on a carburetor holding device (similar to the one shown in Figure ), if available. Such a device will simplify disassembly of the carburetor. CARBURETOR BOWL. Remove Strainer. Remove strainer assembly and gasket from bowl (Figure ). Discard strainer gasket. Figure Float Valve Seat SM-2024 (I-59)

6 Zenith TV Series Cranking Engine Carburetors Carburetors for John Deere Tractors and Engines DISASSEMBLY When disassembling carburetors equipped with automatic gasoline shutoff it is not necessary to detach the shutoff from the carburetor to service either the carburetor or the shutoff. COVER ASSEMBLY Figure 30-S-14-Removing Float Needle Seat Loosen float pin by tapping on end opposite serrated end (Figure ). Remove float pin and float. Unscrew float needle seat from cover (Figure ). BOWL ASSEMBLY Figure 30-S-12-Removing Carburetor Bowl Cover Float Needle and Seat Remove bowl cover (Figure ). Remove load adjusting needle from cover. CAP SCREW CAP SCREW Figure 30-S-1S-Bowl Attaching Cap Screws Remove attaching cap screws (Figure ) and separate bowl from carburetor body Figure 30-S-13-Loosening Float Pin Figure 30-S-JfI-Removing Main Jet Remove main jet and compensating jet (Figure ). SM-2024 (1-59) ~ \6!;1

7 Carburetors for -5-4 John Deere Tractors and Engines Zenith OElS39B Carburetor DISASSEMBLY SEPARATE MAJOR ASSEMBLIES. THROTTLE SHAFT PACKING RETAINER r Remove throttle body. Separate choke body from fuel bowl casting. If assemblies stick together, loosen by tapping with soft hammer. THROTTLE LEVER I""f~\. lj. L_~T!!). ~.~ (,'~~.,_ Figure -S-S-Idle Needles and Throttle Shaft Packing Retainer IDLE PASSAGE Figure -S-4-Throttle Mechanism THROTTLE BODY. With throttle valves in a closed position (Figure -5-4), check for wear on valves and throttle bores. If valves are burred, distorted, or worn, replace valves. To remove throttle valve, remove screws, open throttle wide and pull out valves. Worn valve is usually indicative of worn throttle shaft. Before removing throttle shaft and lever assembly, check shaft for looseness in throttle body. If excessive looseness is evident, it is advisable to install a new throttle shaft and lever assembly and new throttle shaft bushings according to the following instructions. Remove throttle shaft and lever assembly. Remove throttle shaft retainer and packing (Figure -5-5). Note: It is good service practice to install a new packing retainer and packing at time of reconditioning even though the throttle shaft may not need replacing. If the throttle shaft bushings are worn, punch out the throttle shaft cup plug and, using a bushing removal tool (Figure -5-6), drive out the two bushings. Screw idle-adjusting needles with springs out of throttle body (Figure -5-5) Figure -S-6-Remooing Throttle Shaft Bushings MAIN FUEL NOZZLES Figure -5-7-Throttle Body and Parts FUEL BOWL. Remove fuel inlet connection and gasket (Figure -5-7). Remove float lever shaft retainer and lift out the float, float lever shaft, and float needle. If float needle needs replacing, remove it from the float. SM-2024 (1-59)