Service Technical

2. Lubricate O-ring with petroleum jelly. Place electrical tape over threads to protect O-ring. Slide O-ring over tape and into O-ring groove of fitting. Remove tape.

3. Tighten fitting to torque value shown on chart.

Angle Fitting

1. Back-off locknut and back-up washer completely to head-end of fitting.

2. Turn fitting into threaded boss until back-up washer contacts face of boss.

3. Turn fitting head-end counterclockwise to proper index (maximum of one turn).

4. Hold fitting head-end with a wrench and tighten locknut and back-up washer to proper torque value.

5. Do not allow hoses to twist when tightening fittings.


TORQUE VALUE
THREAD SIZE	N·m	lb-ft
3/8-24 UNF	8	6
7/16-20 UNF	12	9
1/2-20 UNF	16	12
9/16-18 UNF	24	18
3/4-16 UNF	46	34
7/8-14 UNF	62	46
1-1/16-12 UN	102	75
1-3/16-12 UN	122	90
1-5/16-12 UN	142	105
1-5/8-12 UN	190	140
1-7/8-12 UN	217	160

NOTE: Torque tolerance is 10%.

FLAT FACE O-RING SEAL FITTINGS

1. Inspect the fitting sealing surfaces. They must be free of dirt or defects.

2. Inspect the O-ring. It must be free of damage or defects.

3. Lubricate O-rings and install into groove using petroleum jelly to hold in place.

4. Push O-ring into the groove with plenty of petroleum jelly so O-ring is not displaced during assembly.

5. Index angle fittings and tighten by hand pressing joint together to ensure O-ring remains in place.

6. Tighten fitting or nut to torque value shown on the chart per dash size stamped on the fitting.

NOTE: Do not allow hoses to twist when tightening fittings.


FLAT FACE O-RING SEAL FITTING TORQUE
NOMINAL TUBE O.D.		THREAD SIZE		SWIVEL NUT TORQUE		BULKHEAD NUT TORQUE
(mm)	(in.)	DASH	(in.)	N·m	(lb-ft.)	N·m	(lb-ft.)
6.35	0.250	-4	9/16-18	16	12	5.0	3.5
9.52	0.375	-6	11/16-16	24	18	9.0	6.5
12.70	0.500	-8	13/16-16	50	37	17.0	12.5
15.88	0.625	-10	1-14	69	51	17.0	12.5
19.05	0.750	-12	1 3/16-12	102	75	17.0	12.5
22.22	0.875	-14	1 3/16-12	102	75	17.0	12.5
25.40	1.000	-16	1 7/16-12	142	105	17.0	12.5
31.75	1.250	-20	1 11/16-12	190	140	17.0	12.5
38.10	1.500	-24	2-12	217	160	17.0	12.5

NOTE: Torque tolerance is +15%-20%.

METRIC BOLT AND CAP SCREW TORQUE VALUES


	Class 4.8				Class 8.8 or 9.8
	Lubricateda		Drya		Lubricateda		Drya
Size	N·m	lb-ft	N·m	lb-ft	N·m	lb-ft	N·m	lb-ft
M6	48	3.5	6	4.5	9	6.5	11	8.5
M8	12	8.5	15	11	22	16	28	20
M10	23	17	29	21	43	32	55	40
M12	40	29	50	37	75	55	95	70
M14	63	47	80	60	120	88	150	110
M16	100	73	125	92	190	140	240	175
M18	135	100	175	125	260	195	330	250
M20	190	140	240	180	375	275	475	350
M22	260	190	330	250	510	375	650	475
M24	330	250	425	310	650	475	825	600
M27	490	360	625	450	950	700	1200	875
M30	675	490	850	625	1300	950	1650	1200
M33	900	675	1150	850	1750	1300	2200	1650
M36	1150	850	1450	1075	2250	1650	2850	2100

METRIC BOLT AND CAP SCREW TORQUE VALUES (Continued):


	Class 10.9				Class 12.9
	Lubricateda		Drya		Lubricateda		Drya
Size	N·m	lb-ft	N·m	lb-ft	N·m	lb-ft	N·m	lb-ft
M6	13	9.5	17	12	15	11.5	19	14.5
M8	32	24	40	30	37	28	47	35
M10	63	47	80	60	75	55	95	70
M12	110	80	140	105	130	95	165	120
M14	175	130	225	165	205	150	260	109
M16	275	200	350	225	320	240	400	300
M18	375	275	475	350	440	325	560	410
M20	530	400	675	500	625	460	800	580
M22	725	540	925	675	850	625	1075	800
M24	925	675	1150	850	1075	800	1350	1000
M27	1350	1000	1700	1250	1600	1150	2000	1500
M30	1850	1350	2300	1700	2150	1600	2700	2000
M33	2500	1850	3150	2350	2900	2150	3700	2750
M36	3200	2350	4050	3000	3750	2750	4750	3500

Fasteners should be replaced with the same or higher grade. If higher grade fasteners are used, these should only be tightened to the strength of the original. Make sure fasteners threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening. Tighten plastic insert or crimped steel-type lock nuts to approximately 50 percent of the dry torque shown in the charts, applied to the nut, not to the bolt head. Tighten toothed or serrated-type lock nuts to the full torque value.

a "Lubricated" means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. "Dry" means plain or zinc plated without any lubrication. b Grade "2" applies for hexcap screws (not hex bolts) up to 152 mm (6 in.) long. Grade "1" applies for hex cap screws over 152 mm (6 in.) long, and for all other types of bolts and screws of any length.

Unified Inch Torque Values


	Grade 1				Grade 2b
	Lubricateda		Drya		Lubricateda		Drya
SIZE	Nm	lb-ft	Nm	lb-ft	Nm	lb-ft	Nm	lb-ft
1/4	3.7	2.8	4.7	3.5	6	4.5	7.5	5.5
5/16	7.7	5.5	10	7	12	9	15	11
3/8	14	10	17	13	22	16	27	20
7/16	22	16	28	20	35	26	44	32
1/2	33	25	42	31	53	39	67	50
9/16	48	36	60	45	75	56	95	70
5/8	67	50	85	62	105	78	135	100
3/4	120	87	150	110	190	140	240	175
7/8	190	140	240	175	190	140	240	175
1	290	210	360	270	290	210	360	270
1-1/8	470	300	510	375	470	300	510	375
1-1/4	570	425	725	530	570	425	725	530
1-3/8	750	550	950	700	750	550	950	700
1-1/2	1000	725	1250	925	990	725	1250	930


	Grade 5, 5.1 or 5.2				Grade 8 or 8.2
	Lubricateda		Drya		Lubricateda		Drya
SIZE	Nm	lb-ft	Nm	lb-ft	Nm	lb-ft	Nm
1/4	9.5	7	12	9	13.5	10	17
5/16	20	15	25	18	28	21	35
3/8	35	26	44	33	50	36	63
7/16	55	< 41	70	52	80	58	100
1/2	85	63	110	80	120	90	150
9/16	125	90	155	115	175	130	225
5/8	170	125	215	160	215	160	300
3/4	300	225	375	280	425	310	550
7/8	490	360	625	450	700	500	875
1	725	540	925	675	1050	750	1300
1-1/8	900	675	1150	850	1450	1075	1850
1-1/4	1300	950	1650	1200	2050	1500	2600
1-3/8	1700	1250	2150	1550	2700	2000	3400
1-1/2	2250	1650	2850	2100	3600	2650	4550

TROUBLESHOOTING HINTS

Almost all failures in the hydrostatic reel drive system will result in a marked loss of reel speed. Each individual component will have to be tested to determine if it has failed. Fluid bypassing internally in a reel motor will reduce the pressure to the other reel motors resulting in a slower cutting speed. A weak hydrostatic pump will also result in a slower reel speed, making it almost impossible to determine what component has failed from observation alone.

Testing the hydraulic pumps with a flow tester can confirm or eliminate it as the source of the problem. This however takes time and maybe some other components should be looked at first.

MIF

c CAUTION: Avoid injury! Search for leaks with a piece of cardboard. Protect hands and body fom high pressure fluids. Always wear gloves when handling hydraulic hoses or connections. Severe burns can result from contact with hot fluid or components. Always wear eye protection.

LOOK: A thorough visual inspection can help locate problem areas, hydraulic components usually show signs from overheating such as burnt or pealing paint and bluing. Check fittings and components for leaks. Check the fluid level in the hydraulic reservoir. Check the hydraulic fluid for contanimants such as metal particles. Look at the hydraulic hoses for signs of deteriation.

LISTEN: Listen to the sound of the reel motors, usually a defective component sounds different or makes no noise at all. Listen for metalic sounds resulting from metal to metal contact.

FEEL: Use a suface temperature gauge to determine if one component is hotter than another component, faulty or weak components will operate at higher temperatures. Feel the hydraulic hoses for unusually soft spots. Feel components for excessive vibration.