that gear you see is driven by the camshaft.. there should be a gasket where the pump bolts to the housing. engine oil can get where that gear is.gasket is number 46
are you seeing engine oil i assume? if you were seeing hyd oil.. I'd also guess you'd be 'making' engine oil' and loosing hyd oil.
here's a parts list of that pump.. and I'll attach a diagram.
look at round gasket #33 see if you have one as well.....
840 4 CYL AG TRACTOR / 10A03 HYDRAULIC PUMP, PISTON TYPE, 53/
840 4 CYL AG TRACTOR / 10A03 HYDRAULIC PUMP, PISTON TYPE, 53/
Key Qty Part Number Part Name Description
1 NCA600F HYDRAULIC MOTOR Pump Assy., Hydraulic, Includes: Cover plus Ref. 2 thru 35
1 312059 COVER Cover, Hydraulic Pump, Replaces P/N NCA893A, Includes: Cover & Ref. 2
2 6 88042 PIN Pin, 3/16" x 3/4", Coiled
3 2 80781 PLUG Plug, Pipe, Sq Hd, 3/8"-18
4 6 354869S36DS BOLT Bolt, 3/8"-16 x 2"
5 6 NCA646B SPRING Spring, Outlet Valve
6 12 354872S BALL Ball, Inlet, Outlet Valve, 11/32" Dia.
7 1 C0NN869A GASKET Gasket, Cover, Inner
8 1 310205 PLATE Plate Assy., Cover Valve, Includes: Ref. 9
9 6 359047S PIN Pin, Inlet Valve Stop, 3/16" Dia. x 11/32"
10 6 NCA647B SPRING Spring, Inlet Valve
11 6 C0NN885A VALVE SEAT Seat, Inlet Valve
12 1 F2NN867AA GASKET Gasket, Cover, Outer, NAA
12 1 D6NN867A GASKET Gasket, Cover, Outer, Except NAA
13 6 313063 SPRING Spring, Piston, NAA
13 6 NCA861B SPRING Spring, Piston, Except NAA
14 1 PL PROCURE LOCALLY Bolt, HH, 1/4"-20 x 1/2", W/NCA893A
14 1 371776S SCREW Screw, Round Hd., 1/4"-20 x 1.12, W/312059
15 6 NAA615C PISTON Piston, Pump, NAA, No Longer Serviced
15 6 NCA615C PISTON Piston, Pump, Except NAA
16 1 NLS No Longer Serviced Body Assy., Pump, [311142], No Longer Serviced
16 1 B9NN882B BODY Body Assy., Pump, Except NAA, No Longer Serviced
17 2 80781 PLUG Plug, Pipe, Sq Hd, 3/8"-18
18 1 913107 O-RING O-Ring, 3.125" ID x .139" Thk, Housing to Pump Body
19 1 NCA859A PLATE Plate, Shaft Wobble
20 1 C0NN858A ROLLER Roller Assy., Wobble Plate Thrust, Replaced By C0NN858A Which Has a Larger O.D. Than Original Bearing. Rollers Extend Slightly Beyond The Race.
21 1 NCA966D SHAFT Shaft, Pump, W/NCA600E & NAA600C
21 1 NCA966E SHAFT Shaft, Pump, W/NAA600D & NCA600F
21 AR EC0N966AA SHAFT Shaft, Pump, W/NAA600D & NCA600F, Piston Type
22 1 NCA970A BEARING ASSY Bearing Assy., Shaft, Outer, W/NAA600C & NCA600E
22 1 36726 BEARING CONE Cone & Roller Assy., W/NAA600D & NCA600F, Replaces P/N 8A1201C
23 1 36723 BEARING CUP Cup, Bearing, Outer, W/NAA600D & NCA600F, Replaces P/N 8A1202B
24 1 C5NN851A SEAL Seal, Shaft, Replaces P/N NCA851A
25 1 36433 NEEDLE BEARING Bearing Assy., Gear Housing, W/NAA600D & NCA600F
26 1 NLS No Longer Serviced Housing, Pump Gear, W/NAA600C & NCA600E, [NCA905B], No Longer Serviced
26 1 NCA905C HOUSING Housing, Pump Gear, W/NAA600D & NCA600F
27 1 C3NN908A GEAR Gear, Pump, Replaces P/N C0NN908A
28 AR PL PROCURE LOCALLY Washer, Flat, 1/4"
29 1 PL PROCURE LOCALLY Washer, Lock, 1/4"
30 1 EAF951A BOLT Bolt, Gear to Shaft
31 1 EAF17375D ADAPTER Adapter Set, Proofmeter Drive, Includes: Adaptor & Ref. 32
32 1 100-1143 SNAP RING Ring, Snap, #43, Ext, Proofmeter Drive
33 1 NAA17382A GASKET Gasket, Proofmeter Drive Bush
34 1 EAF17381A BUSHING Bushing, Proofmeter Drive Shaft, No Longer Serviced
35 4 358624S8 SPARE PART Bolt, 3/8"-16 x 1.38, Housing to Body, No Longer Serviced
2 353374S36 BOLT Bolt, 3/8"-16 x 2.38
36 1 C0NNB998A SEAL O-Ring, Manifold to Pressure Tube
37 4 88388S8 STUD Stud, Screw, 7/16"-14-20 x 1.43, No Longer Serviced
37 3 NSS NOT SERVICED SEPARATELY Stud, 7/16"-14-20 x 1.68, {88408S}
AR PL PROCURE LOCALLY Nut, Hex, 7/16"-20
AR PL PROCURE LOCALLY Washer, Flat, 7/16"
38 1 C0NNB997A SEAL PROTECTION O-Ring, Manifold to Piston Pump
39 1 NCA933J INLET MANIFOLD Manifold, Intake, Used on & BSN 14257, No Longer Serviced
39 1 310878 INLET MANIFOLD Manifold, Intake, Used on & ASN 14256
40 1 86629540 O-RING O-RING, -214, 70 Duro, .984" ID x .139" Thk, Manifold to Piston Pump
41 1 134372 O-RING O-Ring, 1.109" ID x .139" Thk, Manifold to Piston Pump
42 3 354377S8B SPARE PART Bolt, HH, 7/16"-14 x 1-1/4", No Longer Serviced
42 3 PL PROCURE LOCALLY Bolt, HH, 7/16"-14 x 1-1/8"
43 1 NAA876A HYD. TUBE Tube Assy., Hydraulic
44 1 86553262 O-RING O-Ring, .859" ID x .139" Thk, Intake to Center Housing
45 2 14457281 O-RING O-Ring, -114, Cl 7, .612" ID x .103" Thk, Pressure to Center Housing
46 1 EAF911B GASKET Gasket, Gear Housing to Engine
47 1 290421 HUB Hub Assy., Hydraulic Pump Drive Industrial Only, Replaces P/N 114125
48 4 86509732 BLOCK Block, Pump Drive Hub Bushing Industrial Only, Replaces P/N 194343
49 1 194342 BUSHING Bushing, Pump Drive Industrial Only
1 359264S8 BOLT Bolt, Hex, 7/16"-14 x 1.38, Industrial Only
1 NLS No Longer Serviced Plug, Rear, 7/8"-18 {352998S}
AR FPN910B REPAIR KIT Kit, Repair, Hydraulic Pump Includes parts listed below
1 C0NNB997A SEAL PROTECTION O-Ring
1 C0NNB998A SEAL O-Ring
1 F2NN867AA GASKET Gasket, NAA
1 D6NN867A GASKET Gasket, Except NAA
1 C0NN869A GASKET Gasket
1 913107 O-RING O-Ring, 3.125" ID x .139" Thk
1 EAF911B GASKET Gasket
1 NAA17382A GASKET Gasket
1 86553262 O-RING O-Ring, .859" ID x .139" Thk
4 14457281 O-RING O-Ring, -114, Cl 7, .612" ID x .103" Thk
AR CCPN600A REPAIR KIT Kit, Repair, Piston Type Pump, Except NAA, Includes parts listed below
6 NCA646B SPRING Spring
6 NCA647B SPRING Spring
1 C5NN851A SEAL Seal Assy.
6 NCA861B SPRING Spring
1 D6NN867A GASKET Gasket
6 C0NN885A VALVE SEAT Seat
1 C0NN869A GASKET Gasket
1 C0NNB998A SEAL Seal
1 C0NNB997A SEAL PROTECTION Seal
1 310205 PLATE Plate Assy.
1 913107 O-RING O-Ring, 3.125" ID x .139" Thk
12 354872S BALL Ball, 11/32" Dia.
AR CCPN600B REPAIR KIT Kit, Repair, Piston Type Pump, NAA Only Includes parts listed below
6 NCA646B SPRING Spring
6 NCA647B SPRING Spring
1 C5NN851A SEAL Seal Assy.
6 313063 SPRING Spring
1 D6NN867A GASKET Gasket, Replaces P/N NAA-867-A
6 C0NN885A VALVE SEAT Seat
1 C0NN869A GASKET Gasket
1 C0NNB998A SEAL Seal
1 C0NNB997A SEAL PROTECTION Seal
1 310205 PLATE Plate Assy.
1 913107 O-RING O-Ring, 3.125" ID x .139" Thk
12 354872S BALL Ball, 11/32" Dia.